/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/loops-crafted-1/mono-crafted_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 08:32:47,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 08:32:47,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 08:32:47,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 08:32:47,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 08:32:47,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 08:32:47,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 08:32:47,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 08:32:47,611 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 08:32:47,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 08:32:47,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 08:32:47,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 08:32:47,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 08:32:47,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 08:32:47,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 08:32:47,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 08:32:47,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 08:32:47,629 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 08:32:47,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 08:32:47,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 08:32:47,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 08:32:47,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 08:32:47,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 08:32:47,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 08:32:47,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 08:32:47,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 08:32:47,630 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 08:32:47,630 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 08:32:47,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 08:32:47,631 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 08:32:47,631 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 08:32:47,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 08:32:47,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 08:32:47,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 08:32:47,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 08:32:47,863 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 08:32:47,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-19 08:32:47,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbfce00b/dca0d06cd2cb4614aa444e66d88395c8/FLAG883b11543 [2022-03-19 08:32:48,259 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 08:32:48,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-19 08:32:48,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbfce00b/dca0d06cd2cb4614aa444e66d88395c8/FLAG883b11543 [2022-03-19 08:32:48,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbfce00b/dca0d06cd2cb4614aa444e66d88395c8 [2022-03-19 08:32:48,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 08:32:48,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 08:32:48,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 08:32:48,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 08:32:48,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 08:32:48,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 08:32:48" (1/1) ... [2022-03-19 08:32:48,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19b6a84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:32:48, skipping insertion in model container [2022-03-19 08:32:48,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 08:32:48" (1/1) ... [2022-03-19 08:32:48,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 08:32:48,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 08:32:48,394 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-19 08:32:48,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 08:32:48,408 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 08:32:48,416 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-19 08:32:48,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 08:32:48,425 INFO L208 MainTranslator]: Completed translation [2022-03-19 08:32:48,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:32:48 WrapperNode [2022-03-19 08:32:48,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 08:32:48,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 08:32:48,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 08:32:48,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 08:32:48,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:32:48" (1/1) ... [2022-03-19 08:32:48,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:32:48" (1/1) ... [2022-03-19 08:32:48,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:32:48" (1/1) ... [2022-03-19 08:32:48,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:32:48" (1/1) ... [2022-03-19 08:32:48,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:32:48" (1/1) ... [2022-03-19 08:32:48,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:32:48" (1/1) ... [2022-03-19 08:32:48,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:32:48" (1/1) ... [2022-03-19 08:32:48,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 08:32:48,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 08:32:48,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 08:32:48,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 08:32:48,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:32:48" (1/1) ... [2022-03-19 08:32:48,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 08:32:48,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:32:48,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 08:32:48,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 08:32:48,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 08:32:48,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 08:32:48,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 08:32:48,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 08:32:48,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 08:32:48,519 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 08:32:48,519 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 08:32:48,519 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 08:32:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 08:32:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 08:32:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 08:32:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 08:32:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 08:32:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 08:32:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 08:32:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 08:32:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 08:32:48,558 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 08:32:48,559 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 08:32:48,626 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 08:32:48,630 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 08:32:48,630 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 08:32:48,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 08:32:48 BoogieIcfgContainer [2022-03-19 08:32:48,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 08:32:48,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 08:32:48,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 08:32:48,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 08:32:48,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 08:32:48" (1/3) ... [2022-03-19 08:32:48,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dc5d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 08:32:48, skipping insertion in model container [2022-03-19 08:32:48,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 08:32:48" (2/3) ... [2022-03-19 08:32:48,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dc5d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 08:32:48, skipping insertion in model container [2022-03-19 08:32:48,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 08:32:48" (3/3) ... [2022-03-19 08:32:48,651 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2022-03-19 08:32:48,655 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 08:32:48,655 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 08:32:48,692 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 08:32:48,701 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 08:32:48,701 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 08:32:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 08:32:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 08:32:48,727 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:48,727 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:48,727 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 1 times [2022-03-19 08:32:48,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:48,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1124286135] [2022-03-19 08:32:48,746 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:32:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 2 times [2022-03-19 08:32:48,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:48,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644023094] [2022-03-19 08:32:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:48,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:48,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:48,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644023094] [2022-03-19 08:32:48,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644023094] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:48,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:48,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 08:32:48,868 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:32:48,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1124286135] [2022-03-19 08:32:48,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1124286135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:48,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:48,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 08:32:48,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178244071] [2022-03-19 08:32:48,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:32:48,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 08:32:48,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 08:32:48,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 08:32:48,896 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:32:48,949 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-19 08:32:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 08:32:48,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 08:32:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:32:48,954 INFO L225 Difference]: With dead ends: 32 [2022-03-19 08:32:48,955 INFO L226 Difference]: Without dead ends: 13 [2022-03-19 08:32:48,956 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 08:32:48,958 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:32:48,959 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:32:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-19 08:32:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-19 08:32:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-19 08:32:48,987 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-19 08:32:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:32:48,989 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-19 08:32:48,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-19 08:32:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 08:32:48,989 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:48,990 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:48,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 08:32:48,990 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:48,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-03-19 08:32:48,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:48,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1606601453] [2022-03-19 08:32:48,992 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 08:32:48,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 2 times [2022-03-19 08:32:48,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:48,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934195082] [2022-03-19 08:32:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:48,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:49,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:49,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:49,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934195082] [2022-03-19 08:32:49,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934195082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:49,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:49,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 08:32:49,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:32:49,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1606601453] [2022-03-19 08:32:49,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1606601453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:49,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:49,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 08:32:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650688556] [2022-03-19 08:32:49,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:32:49,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 08:32:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 08:32:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 08:32:49,060 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:32:49,100 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-19 08:32:49,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 08:32:49,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 08:32:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:32:49,101 INFO L225 Difference]: With dead ends: 22 [2022-03-19 08:32:49,101 INFO L226 Difference]: Without dead ends: 15 [2022-03-19 08:32:49,101 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 08:32:49,102 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:32:49,103 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:32:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-19 08:32:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-19 08:32:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-19 08:32:49,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-19 08:32:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:32:49,107 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-19 08:32:49,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-19 08:32:49,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 08:32:49,107 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:49,107 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:49,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 08:32:49,108 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1372110560, now seen corresponding path program 1 times [2022-03-19 08:32:49,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:49,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [346002487] [2022-03-19 08:32:49,187 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 08:32:49,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1209153456, now seen corresponding path program 1 times [2022-03-19 08:32:49,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:49,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271687990] [2022-03-19 08:32:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:49,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:49,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:49,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:49,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271687990] [2022-03-19 08:32:49,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271687990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:49,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:49,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 08:32:49,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:32:49,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [346002487] [2022-03-19 08:32:49,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [346002487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:49,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:49,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 08:32:49,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27049695] [2022-03-19 08:32:49,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:32:49,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 08:32:49,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 08:32:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-19 08:32:49,270 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:32:49,335 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-19 08:32:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 08:32:49,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-19 08:32:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:32:49,336 INFO L225 Difference]: With dead ends: 22 [2022-03-19 08:32:49,336 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 08:32:49,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-19 08:32:49,339 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:32:49,344 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:32:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 08:32:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-19 08:32:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-19 08:32:49,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-03-19 08:32:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:32:49,358 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-19 08:32:49,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-19 08:32:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 08:32:49,358 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:49,358 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:49,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 08:32:49,359 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:49,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 1 times [2022-03-19 08:32:49,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:49,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [997799968] [2022-03-19 08:32:53,948 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:32:53,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1150048112, now seen corresponding path program 1 times [2022-03-19 08:32:53,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:53,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532715729] [2022-03-19 08:32:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:53,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:53,968 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:32:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:54,008 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:32:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 2 times [2022-03-19 08:32:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:54,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062097367] [2022-03-19 08:32:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:54,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:54,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:54,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:54,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062097367] [2022-03-19 08:32:54,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062097367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:32:54,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76993944] [2022-03-19 08:32:54,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:32:54,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:54,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:32:54,076 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:32:54,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:32:54,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:32:54,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 08:32:54,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 08:32:54,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:32:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:54,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:32:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:54,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76993944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:32:54,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:32:54,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 08:32:54,251 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:32:54,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [997799968] [2022-03-19 08:32:54,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [997799968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:54,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:54,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 08:32:54,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007702543] [2022-03-19 08:32:54,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:32:54,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 08:32:54,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 08:32:54,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 08:32:54,253 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:54,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:32:54,338 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-03-19 08:32:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 08:32:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 08:32:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:32:54,338 INFO L225 Difference]: With dead ends: 26 [2022-03-19 08:32:54,339 INFO L226 Difference]: Without dead ends: 19 [2022-03-19 08:32:54,339 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 08:32:54,339 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:32:54,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:32:54,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-19 08:32:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-19 08:32:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-19 08:32:54,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-03-19 08:32:54,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:32:54,343 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-19 08:32:54,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-19 08:32:54,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 08:32:54,344 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:54,344 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:54,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 08:32:54,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:54,560 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:54,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:54,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1870563496, now seen corresponding path program 3 times [2022-03-19 08:32:54,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:54,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1468673400] [2022-03-19 08:32:54,827 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:32:54,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1090942768, now seen corresponding path program 1 times [2022-03-19 08:32:54,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:54,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496139872] [2022-03-19 08:32:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:54,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:54,841 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:32:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:54,849 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:32:54,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1870563496, now seen corresponding path program 4 times [2022-03-19 08:32:54,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:54,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604374218] [2022-03-19 08:32:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:54,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:54,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:54,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:54,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604374218] [2022-03-19 08:32:54,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604374218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:32:54,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617654612] [2022-03-19 08:32:54,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:32:54,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:54,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:32:54,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:32:54,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 08:32:54,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:32:54,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:32:54,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:32:54,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:32:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:54,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:32:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:55,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617654612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:32:55,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:32:55,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-19 08:32:55,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:32:55,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1468673400] [2022-03-19 08:32:55,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1468673400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:55,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:55,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 08:32:55,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468776630] [2022-03-19 08:32:55,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:32:55,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 08:32:55,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:55,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 08:32:55,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 08:32:55,054 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:32:55,095 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-03-19 08:32:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 08:32:55,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 08:32:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:32:55,096 INFO L225 Difference]: With dead ends: 28 [2022-03-19 08:32:55,096 INFO L226 Difference]: Without dead ends: 21 [2022-03-19 08:32:55,096 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-03-19 08:32:55,098 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:32:55,098 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:32:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-19 08:32:55,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-19 08:32:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-19 08:32:55,106 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-03-19 08:32:55,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:32:55,106 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-19 08:32:55,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-19 08:32:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 08:32:55,107 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:55,108 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:55,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 08:32:55,324 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,SelfDestructingSolverStorable6,SelfDestructingSolverStorable5 [2022-03-19 08:32:55,324 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:55,325 INFO L85 PathProgramCache]: Analyzing trace with hash -402805515, now seen corresponding path program 5 times [2022-03-19 08:32:55,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:55,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769019466] [2022-03-19 08:32:55,534 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:32:55,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1031837424, now seen corresponding path program 1 times [2022-03-19 08:32:55,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:55,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224251788] [2022-03-19 08:32:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:55,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:55,551 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:32:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:55,557 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:32:55,557 INFO L85 PathProgramCache]: Analyzing trace with hash -402805515, now seen corresponding path program 6 times [2022-03-19 08:32:55,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:55,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174062872] [2022-03-19 08:32:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:55,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:55,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:55,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:55,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174062872] [2022-03-19 08:32:55,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174062872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:32:55,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825025663] [2022-03-19 08:32:55,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:32:55,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:55,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:32:55,620 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:32:55,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 08:32:55,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 08:32:55,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:32:55,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 08:32:55,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:32:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 08:32:55,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:32:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 08:32:55,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825025663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:32:55,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:32:55,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-03-19 08:32:55,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:32:55,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769019466] [2022-03-19 08:32:55,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769019466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:55,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:55,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 08:32:55,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587465288] [2022-03-19 08:32:55,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:32:55,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 08:32:55,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 08:32:55,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-19 08:32:55,762 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:32:55,823 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-03-19 08:32:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 08:32:55,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-19 08:32:55,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:32:55,824 INFO L225 Difference]: With dead ends: 30 [2022-03-19 08:32:55,824 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 08:32:55,824 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=152, Unknown=0, NotChecked=0, Total=272 [2022-03-19 08:32:55,825 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:32:55,825 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:32:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 08:32:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-19 08:32:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-19 08:32:55,828 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2022-03-19 08:32:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:32:55,828 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-19 08:32:55,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-19 08:32:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 08:32:55,829 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:55,829 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:55,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 08:32:56,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:56,039 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:56,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1363341138, now seen corresponding path program 7 times [2022-03-19 08:32:56,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:56,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1497352110] [2022-03-19 08:32:56,177 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:32:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash -972732080, now seen corresponding path program 1 times [2022-03-19 08:32:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:56,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163939103] [2022-03-19 08:32:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:56,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:56,182 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:32:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:56,187 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:32:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1363341138, now seen corresponding path program 8 times [2022-03-19 08:32:56,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:56,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336661158] [2022-03-19 08:32:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:56,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:56,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:56,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:56,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336661158] [2022-03-19 08:32:56,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336661158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:32:56,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38777889] [2022-03-19 08:32:56,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:32:56,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:56,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:32:56,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:32:56,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 08:32:56,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:32:56,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:32:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 08:32:56,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:32:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:56,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:32:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:56,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38777889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:32:56,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:32:56,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-19 08:32:56,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:32:56,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1497352110] [2022-03-19 08:32:56,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1497352110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:56,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:56,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 08:32:56,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704496458] [2022-03-19 08:32:56,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:32:56,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 08:32:56,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 08:32:56,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-19 08:32:56,388 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:32:56,440 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-19 08:32:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 08:32:56,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 08:32:56,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:32:56,440 INFO L225 Difference]: With dead ends: 32 [2022-03-19 08:32:56,440 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 08:32:56,441 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-19 08:32:56,441 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:32:56,441 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:32:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 08:32:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-19 08:32:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-03-19 08:32:56,444 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-03-19 08:32:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:32:56,445 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-03-19 08:32:56,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-03-19 08:32:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 08:32:56,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:56,445 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:56,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 08:32:56,646 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:56,646 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:56,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2118192751, now seen corresponding path program 9 times [2022-03-19 08:32:56,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:56,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [602126155] [2022-03-19 08:32:56,830 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:32:56,830 INFO L85 PathProgramCache]: Analyzing trace with hash -913626736, now seen corresponding path program 1 times [2022-03-19 08:32:56,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:56,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212098335] [2022-03-19 08:32:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:56,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:56,835 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:32:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:56,839 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:32:56,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2118192751, now seen corresponding path program 10 times [2022-03-19 08:32:56,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:56,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48124556] [2022-03-19 08:32:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:56,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:56,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:56,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:56,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48124556] [2022-03-19 08:32:56,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48124556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:32:56,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999973703] [2022-03-19 08:32:56,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:32:56,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:56,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:32:56,887 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:32:56,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 08:32:56,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:32:56,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:32:56,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 08:32:56,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:32:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:56,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:32:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:57,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999973703] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:32:57,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:32:57,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-19 08:32:57,027 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:32:57,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [602126155] [2022-03-19 08:32:57,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [602126155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:57,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:57,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 08:32:57,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088371742] [2022-03-19 08:32:57,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:32:57,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 08:32:57,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 08:32:57,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-03-19 08:32:57,028 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:32:57,108 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-19 08:32:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 08:32:57,108 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 08:32:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:32:57,110 INFO L225 Difference]: With dead ends: 34 [2022-03-19 08:32:57,110 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 08:32:57,111 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-03-19 08:32:57,112 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:32:57,112 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:32:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 08:32:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-19 08:32:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-03-19 08:32:57,122 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2022-03-19 08:32:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:32:57,122 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-03-19 08:32:57,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:57,122 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-03-19 08:32:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 08:32:57,122 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:57,122 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:57,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 08:32:57,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11,SelfDestructingSolverStorable12 [2022-03-19 08:32:57,339 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:57,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1681119820, now seen corresponding path program 11 times [2022-03-19 08:32:57,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:57,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [702682333] [2022-03-19 08:32:57,562 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:32:57,563 INFO L85 PathProgramCache]: Analyzing trace with hash -854521392, now seen corresponding path program 1 times [2022-03-19 08:32:57,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:57,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158809753] [2022-03-19 08:32:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:57,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:57,567 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:32:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:57,570 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:32:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1681119820, now seen corresponding path program 12 times [2022-03-19 08:32:57,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:57,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467472398] [2022-03-19 08:32:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:57,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:57,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:57,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:57,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467472398] [2022-03-19 08:32:57,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467472398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:32:57,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484441606] [2022-03-19 08:32:57,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:32:57,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:57,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:32:57,654 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:32:57,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 08:32:57,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:32:57,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:32:57,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 08:32:57,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:32:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 08:32:57,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:32:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 08:32:57,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484441606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:32:57,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:32:57,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 18 [2022-03-19 08:32:57,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:32:57,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [702682333] [2022-03-19 08:32:57,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [702682333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:57,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:57,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 08:32:57,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929369272] [2022-03-19 08:32:57,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:32:57,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 08:32:57,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 08:32:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-19 08:32:57,833 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:57,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:32:57,908 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-03-19 08:32:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 08:32:57,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-19 08:32:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:32:57,909 INFO L225 Difference]: With dead ends: 36 [2022-03-19 08:32:57,909 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 08:32:57,910 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=336, Unknown=0, NotChecked=0, Total=600 [2022-03-19 08:32:57,910 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:32:57,910 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 29 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:32:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 08:32:57,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-19 08:32:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-19 08:32:57,913 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-03-19 08:32:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:32:57,913 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-19 08:32:57,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-19 08:32:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 08:32:57,914 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:57,914 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:57,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 08:32:58,130 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 08:32:58,130 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:58,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1734139159, now seen corresponding path program 13 times [2022-03-19 08:32:58,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:58,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1566987327] [2022-03-19 08:32:58,297 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:32:58,297 INFO L85 PathProgramCache]: Analyzing trace with hash -795416048, now seen corresponding path program 1 times [2022-03-19 08:32:58,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:58,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431961544] [2022-03-19 08:32:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:58,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:58,301 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:32:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:58,304 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:32:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1734139159, now seen corresponding path program 14 times [2022-03-19 08:32:58,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:58,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592639154] [2022-03-19 08:32:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:58,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:58,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:58,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:58,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592639154] [2022-03-19 08:32:58,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592639154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:32:58,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734668343] [2022-03-19 08:32:58,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:32:58,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:58,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:32:58,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:32:58,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 08:32:58,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:32:58,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:32:58,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 08:32:58,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:32:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:58,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:32:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:58,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734668343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:32:58,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:32:58,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-19 08:32:58,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:32:58,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1566987327] [2022-03-19 08:32:58,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1566987327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:58,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:58,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 08:32:58,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588088783] [2022-03-19 08:32:58,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:32:58,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 08:32:58,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 08:32:58,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-19 08:32:58,532 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:58,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:32:58,611 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-03-19 08:32:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 08:32:58,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 08:32:58,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:32:58,612 INFO L225 Difference]: With dead ends: 38 [2022-03-19 08:32:58,612 INFO L226 Difference]: Without dead ends: 31 [2022-03-19 08:32:58,612 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-19 08:32:58,613 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:32:58,613 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:32:58,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-19 08:32:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-19 08:32:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-03-19 08:32:58,616 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2022-03-19 08:32:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:32:58,616 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-03-19 08:32:58,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-03-19 08:32:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 08:32:58,616 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:58,616 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:58,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 08:32:58,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:58,833 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:58,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1851963462, now seen corresponding path program 15 times [2022-03-19 08:32:58,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:58,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [814861626] [2022-03-19 08:32:59,047 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:32:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash -736310704, now seen corresponding path program 1 times [2022-03-19 08:32:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:59,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504213086] [2022-03-19 08:32:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:59,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:59,051 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:32:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:59,054 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:32:59,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1851963462, now seen corresponding path program 16 times [2022-03-19 08:32:59,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:59,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921498437] [2022-03-19 08:32:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:59,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:59,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:59,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:59,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921498437] [2022-03-19 08:32:59,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921498437] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:32:59,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223738998] [2022-03-19 08:32:59,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:32:59,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:59,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:32:59,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:32:59,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 08:32:59,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:32:59,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:32:59,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 08:32:59,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:32:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:59,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:32:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:59,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223738998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:32:59,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:32:59,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-19 08:32:59,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:32:59,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [814861626] [2022-03-19 08:32:59,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [814861626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:32:59,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:32:59,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 08:32:59,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808290647] [2022-03-19 08:32:59,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:32:59,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 08:32:59,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:59,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 08:32:59,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-19 08:32:59,306 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:32:59,387 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-03-19 08:32:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 08:32:59,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 08:32:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:32:59,389 INFO L225 Difference]: With dead ends: 40 [2022-03-19 08:32:59,389 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 08:32:59,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-03-19 08:32:59,389 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:32:59,390 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 34 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:32:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 08:32:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 08:32:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-19 08:32:59,396 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-03-19 08:32:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:32:59,396 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-19 08:32:59,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:32:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-19 08:32:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 08:32:59,398 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:32:59,398 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:32:59,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 08:32:59,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 08:32:59,613 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:32:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:32:59,614 INFO L85 PathProgramCache]: Analyzing trace with hash -762156445, now seen corresponding path program 17 times [2022-03-19 08:32:59,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:32:59,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679224710] [2022-03-19 08:32:59,833 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:32:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -677205360, now seen corresponding path program 1 times [2022-03-19 08:32:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:59,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510535927] [2022-03-19 08:32:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:59,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:59,839 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:32:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:32:59,844 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:32:59,844 INFO L85 PathProgramCache]: Analyzing trace with hash -762156445, now seen corresponding path program 18 times [2022-03-19 08:32:59,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:32:59,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950021507] [2022-03-19 08:32:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:32:59,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:32:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:59,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:32:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:32:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:32:59,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:32:59,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950021507] [2022-03-19 08:32:59,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950021507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:32:59,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913851990] [2022-03-19 08:32:59,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:32:59,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:32:59,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:32:59,919 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:32:59,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 08:32:59,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:32:59,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:32:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:32:59,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:32:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 08:32:59,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 08:33:00,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913851990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:00,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:00,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 17 [2022-03-19 08:33:00,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:00,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679224710] [2022-03-19 08:33:00,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679224710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:00,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:00,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 08:33:00,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742974206] [2022-03-19 08:33:00,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:00,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 08:33:00,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:00,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 08:33:00,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-03-19 08:33:00,058 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:00,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:00,163 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-19 08:33:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 08:33:00,164 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 08:33:00,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:00,164 INFO L225 Difference]: With dead ends: 42 [2022-03-19 08:33:00,164 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 08:33:00,164 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=292, Invalid=410, Unknown=0, NotChecked=0, Total=702 [2022-03-19 08:33:00,165 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:00,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:00,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 08:33:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-19 08:33:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-03-19 08:33:00,168 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2022-03-19 08:33:00,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:00,168 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-03-19 08:33:00,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:00,168 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-03-19 08:33:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 08:33:00,168 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:00,168 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:00,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:00,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:00,383 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash -375518912, now seen corresponding path program 19 times [2022-03-19 08:33:00,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:00,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2106843022] [2022-03-19 08:33:00,538 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash -618100016, now seen corresponding path program 1 times [2022-03-19 08:33:00,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:00,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000451638] [2022-03-19 08:33:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:00,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:00,541 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:00,546 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:00,546 INFO L85 PathProgramCache]: Analyzing trace with hash -375518912, now seen corresponding path program 20 times [2022-03-19 08:33:00,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:00,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078150459] [2022-03-19 08:33:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:00,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:00,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:00,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:00,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078150459] [2022-03-19 08:33:00,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078150459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:00,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330036009] [2022-03-19 08:33:00,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:00,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:00,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:00,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:00,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 08:33:00,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:00,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:00,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 08:33:00,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:00,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:00,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330036009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:00,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:00,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-19 08:33:00,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:00,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2106843022] [2022-03-19 08:33:00,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2106843022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:00,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:00,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 08:33:00,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145771647] [2022-03-19 08:33:00,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:00,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 08:33:00,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:00,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 08:33:00,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-19 08:33:00,853 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:00,966 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-03-19 08:33:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 08:33:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-19 08:33:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:00,967 INFO L225 Difference]: With dead ends: 44 [2022-03-19 08:33:00,967 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 08:33:00,968 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 08:33:00,968 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:00,968 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 08:33:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 08:33:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:00,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-19 08:33:00,971 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2022-03-19 08:33:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:00,971 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-19 08:33:00,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-19 08:33:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 08:33:00,972 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:00,972 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:00,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:01,180 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,SelfDestructingSolverStorable21,SelfDestructingSolverStorable22 [2022-03-19 08:33:01,181 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1815962845, now seen corresponding path program 21 times [2022-03-19 08:33:01,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:01,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679792261] [2022-03-19 08:33:01,369 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:01,369 INFO L85 PathProgramCache]: Analyzing trace with hash -558994672, now seen corresponding path program 1 times [2022-03-19 08:33:01,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:01,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231143030] [2022-03-19 08:33:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:01,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:01,372 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:01,375 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:01,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1815962845, now seen corresponding path program 22 times [2022-03-19 08:33:01,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:01,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811015410] [2022-03-19 08:33:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:01,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:01,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:01,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:01,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811015410] [2022-03-19 08:33:01,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811015410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:01,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395248384] [2022-03-19 08:33:01,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:01,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:01,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:01,482 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:01,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 08:33:01,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:01,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:01,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 08:33:01,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:01,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:01,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395248384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:01,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:01,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-19 08:33:01,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:01,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679792261] [2022-03-19 08:33:01,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679792261] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:01,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:01,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 08:33:01,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567305698] [2022-03-19 08:33:01,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:01,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 08:33:01,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:01,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 08:33:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-03-19 08:33:01,821 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:01,958 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-03-19 08:33:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 08:33:01,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 08:33:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:01,958 INFO L225 Difference]: With dead ends: 46 [2022-03-19 08:33:01,958 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 08:33:01,959 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 08:33:01,959 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:01,960 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 08:33:01,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-19 08:33:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-03-19 08:33:01,962 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2022-03-19 08:33:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:01,963 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-03-19 08:33:01,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-03-19 08:33:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 08:33:01,963 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:01,963 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:01,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:02,163 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,SelfDestructingSolverStorable23,SelfDestructingSolverStorable24 [2022-03-19 08:33:02,164 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:02,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:02,164 INFO L85 PathProgramCache]: Analyzing trace with hash -999011014, now seen corresponding path program 23 times [2022-03-19 08:33:02,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:02,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1312381519] [2022-03-19 08:33:02,319 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:02,320 INFO L85 PathProgramCache]: Analyzing trace with hash -499889328, now seen corresponding path program 1 times [2022-03-19 08:33:02,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:02,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219191764] [2022-03-19 08:33:02,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:02,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:02,323 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:02,326 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:02,326 INFO L85 PathProgramCache]: Analyzing trace with hash -999011014, now seen corresponding path program 24 times [2022-03-19 08:33:02,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:02,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690115730] [2022-03-19 08:33:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:02,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:02,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:02,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:02,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690115730] [2022-03-19 08:33:02,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690115730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:02,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218082536] [2022-03-19 08:33:02,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:02,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:02,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:02,422 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:02,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 08:33:02,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:02,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:02,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-19 08:33:02,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-19 08:33:02,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218082536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:02,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:02,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 4, 4] total 20 [2022-03-19 08:33:02,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:02,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1312381519] [2022-03-19 08:33:02,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1312381519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:02,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:02,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 08:33:02,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158151075] [2022-03-19 08:33:02,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:02,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 08:33:02,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 08:33:02,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-19 08:33:02,596 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:02,726 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-03-19 08:33:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 08:33:02,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 08:33:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:02,727 INFO L225 Difference]: With dead ends: 48 [2022-03-19 08:33:02,727 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 08:33:02,728 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=433, Invalid=623, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 08:33:02,728 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:02,728 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 34 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 08:33:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-19 08:33:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-03-19 08:33:02,731 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2022-03-19 08:33:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:02,731 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-03-19 08:33:02,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-03-19 08:33:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 08:33:02,731 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:02,732 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:02,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:02,939 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,SelfDestructingSolverStorable25,SelfDestructingSolverStorable26 [2022-03-19 08:33:02,939 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:02,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:02,940 INFO L85 PathProgramCache]: Analyzing trace with hash -359493033, now seen corresponding path program 25 times [2022-03-19 08:33:02,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:02,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [843191186] [2022-03-19 08:33:03,123 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:03,123 INFO L85 PathProgramCache]: Analyzing trace with hash -440783984, now seen corresponding path program 1 times [2022-03-19 08:33:03,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:03,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629993664] [2022-03-19 08:33:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:03,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:03,126 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:03,129 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:03,129 INFO L85 PathProgramCache]: Analyzing trace with hash -359493033, now seen corresponding path program 26 times [2022-03-19 08:33:03,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662895193] [2022-03-19 08:33:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:03,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:03,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:03,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:03,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662895193] [2022-03-19 08:33:03,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662895193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:03,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502217987] [2022-03-19 08:33:03,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:03,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:03,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:03,236 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:03,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 08:33:03,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:03,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:03,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 08:33:03,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:03,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:03,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502217987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:03,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:03,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-19 08:33:03,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:03,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [843191186] [2022-03-19 08:33:03,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [843191186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:03,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:03,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 08:33:03,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840293989] [2022-03-19 08:33:03,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:03,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 08:33:03,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:03,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 08:33:03,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-19 08:33:03,601 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:03,760 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-03-19 08:33:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 08:33:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-19 08:33:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:03,761 INFO L225 Difference]: With dead ends: 50 [2022-03-19 08:33:03,761 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 08:33:03,761 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 08:33:03,762 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:03,762 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 08:33:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-19 08:33:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-03-19 08:33:03,765 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2022-03-19 08:33:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:03,765 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-03-19 08:33:03,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-03-19 08:33:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 08:33:03,765 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:03,765 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:03,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:03,975 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,SelfDestructingSolverStorable27,SelfDestructingSolverStorable28 [2022-03-19 08:33:03,975 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:03,976 INFO L85 PathProgramCache]: Analyzing trace with hash 36963380, now seen corresponding path program 27 times [2022-03-19 08:33:03,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:03,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806883751] [2022-03-19 08:33:04,162 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash -381678640, now seen corresponding path program 1 times [2022-03-19 08:33:04,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:04,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562535674] [2022-03-19 08:33:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:04,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:04,183 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:04,185 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:04,185 INFO L85 PathProgramCache]: Analyzing trace with hash 36963380, now seen corresponding path program 28 times [2022-03-19 08:33:04,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:04,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18597110] [2022-03-19 08:33:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:04,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:04,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:04,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:04,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18597110] [2022-03-19 08:33:04,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18597110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:04,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673530501] [2022-03-19 08:33:04,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:04,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:04,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:04,346 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:04,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 08:33:04,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:04,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:04,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 08:33:04,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:04,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:04,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673530501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:04,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:04,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-19 08:33:04,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:04,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806883751] [2022-03-19 08:33:04,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806883751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:04,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:04,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 08:33:04,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044947449] [2022-03-19 08:33:04,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:04,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 08:33:04,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 08:33:04,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 08:33:04,704 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:04,860 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-19 08:33:04,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 08:33:04,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-19 08:33:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:04,861 INFO L225 Difference]: With dead ends: 52 [2022-03-19 08:33:04,861 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 08:33:04,862 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 08:33:04,866 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:04,866 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 08:33:04,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-19 08:33:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-03-19 08:33:04,875 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2022-03-19 08:33:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:04,875 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-03-19 08:33:04,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:04,875 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-03-19 08:33:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 08:33:04,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:04,876 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:04,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:05,084 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:05,084 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:05,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1220513071, now seen corresponding path program 29 times [2022-03-19 08:33:05,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:05,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1331839832] [2022-03-19 08:33:05,250 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:05,250 INFO L85 PathProgramCache]: Analyzing trace with hash -322573296, now seen corresponding path program 1 times [2022-03-19 08:33:05,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:05,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46178009] [2022-03-19 08:33:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:05,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:05,253 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:05,255 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:05,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1220513071, now seen corresponding path program 30 times [2022-03-19 08:33:05,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:05,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730580294] [2022-03-19 08:33:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:05,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:05,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:05,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:05,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730580294] [2022-03-19 08:33:05,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730580294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:05,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556485315] [2022-03-19 08:33:05,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:05,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:05,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:05,381 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:05,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 08:33:05,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:05,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 08:33:05,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 08:33:05,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556485315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:05,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:05,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 4] total 23 [2022-03-19 08:33:05,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:05,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1331839832] [2022-03-19 08:33:05,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1331839832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:05,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:05,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 08:33:05,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168894940] [2022-03-19 08:33:05,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:05,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 08:33:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 08:33:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-19 08:33:05,549 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:05,720 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2022-03-19 08:33:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 08:33:05,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-19 08:33:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:05,721 INFO L225 Difference]: With dead ends: 54 [2022-03-19 08:33:05,721 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 08:33:05,722 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=601, Invalid=881, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 08:33:05,722 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:05,722 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 08:33:05,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 08:33:05,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:05,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-03-19 08:33:05,725 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2022-03-19 08:33:05,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:05,725 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-03-19 08:33:05,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:05,725 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-03-19 08:33:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 08:33:05,725 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:05,726 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:05,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:05,933 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:05,933 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:05,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1525394990, now seen corresponding path program 31 times [2022-03-19 08:33:05,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:05,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [570663766] [2022-03-19 08:33:06,133 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:06,134 INFO L85 PathProgramCache]: Analyzing trace with hash -263467952, now seen corresponding path program 1 times [2022-03-19 08:33:06,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:06,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963465132] [2022-03-19 08:33:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:06,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:06,137 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:06,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:06,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1525394990, now seen corresponding path program 32 times [2022-03-19 08:33:06,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:06,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543818119] [2022-03-19 08:33:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:06,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:06,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:06,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:06,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543818119] [2022-03-19 08:33:06,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543818119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:06,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479429387] [2022-03-19 08:33:06,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:06,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:06,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:06,308 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:06,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 08:33:06,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:06,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:06,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 08:33:06,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:06,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:06,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479429387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:06,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:06,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-19 08:33:06,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:06,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [570663766] [2022-03-19 08:33:06,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [570663766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:06,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:06,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 08:33:06,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102995761] [2022-03-19 08:33:06,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:06,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 08:33:06,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:06,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 08:33:06,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 08:33:06,745 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:06,929 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-03-19 08:33:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 08:33:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-19 08:33:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:06,930 INFO L225 Difference]: With dead ends: 56 [2022-03-19 08:33:06,930 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 08:33:06,931 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 08:33:06,931 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:06,931 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 08:33:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-19 08:33:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-03-19 08:33:06,934 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2022-03-19 08:33:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:06,934 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-03-19 08:33:06,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-03-19 08:33:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 08:33:06,935 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:06,935 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:06,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:07,143 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,SelfDestructingSolverStorable33,SelfDestructingSolverStorable34 [2022-03-19 08:33:07,143 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:07,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1061845429, now seen corresponding path program 33 times [2022-03-19 08:33:07,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:07,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1955427918] [2022-03-19 08:33:07,272 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash -204362608, now seen corresponding path program 1 times [2022-03-19 08:33:07,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:07,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335899040] [2022-03-19 08:33:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:07,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:07,277 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:07,283 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:07,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1061845429, now seen corresponding path program 34 times [2022-03-19 08:33:07,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:07,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655952968] [2022-03-19 08:33:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:07,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:07,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:07,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:07,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655952968] [2022-03-19 08:33:07,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655952968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:07,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229236226] [2022-03-19 08:33:07,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:07,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:07,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:07,434 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) [2022-03-19 08:33:07,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 08:33:07,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:07,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:07,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 08:33:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:07,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:07,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229236226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:07,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:07,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-19 08:33:07,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:07,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1955427918] [2022-03-19 08:33:07,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1955427918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:07,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:07,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 08:33:07,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688611115] [2022-03-19 08:33:07,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:07,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 08:33:07,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:07,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 08:33:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 08:33:07,829 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:08,043 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-03-19 08:33:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 08:33:08,043 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-19 08:33:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:08,043 INFO L225 Difference]: With dead ends: 58 [2022-03-19 08:33:08,043 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 08:33:08,044 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 08:33:08,045 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:08,045 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 44 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:08,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 08:33:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-19 08:33:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-03-19 08:33:08,048 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2022-03-19 08:33:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:08,048 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-03-19 08:33:08,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-03-19 08:33:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 08:33:08,049 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:08,049 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:08,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:08,252 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-19 08:33:08,253 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:08,253 INFO L85 PathProgramCache]: Analyzing trace with hash -613823704, now seen corresponding path program 35 times [2022-03-19 08:33:08,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:08,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358002643] [2022-03-19 08:33:08,450 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:08,450 INFO L85 PathProgramCache]: Analyzing trace with hash -145257264, now seen corresponding path program 1 times [2022-03-19 08:33:08,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:08,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698232355] [2022-03-19 08:33:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:08,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:08,466 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:08,469 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash -613823704, now seen corresponding path program 36 times [2022-03-19 08:33:08,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:08,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580179677] [2022-03-19 08:33:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:08,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:08,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:08,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:08,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580179677] [2022-03-19 08:33:08,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580179677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:08,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749271278] [2022-03-19 08:33:08,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:08,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:08,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:08,655 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) [2022-03-19 08:33:08,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 08:33:08,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:08,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:08,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-19 08:33:08,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-19 08:33:08,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749271278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:08,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:08,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 4, 4] total 26 [2022-03-19 08:33:08,882 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:08,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358002643] [2022-03-19 08:33:08,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358002643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:08,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:08,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 08:33:08,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289528234] [2022-03-19 08:33:08,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:08,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 08:33:08,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:08,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 08:33:08,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-19 08:33:08,883 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:09,066 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-19 08:33:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 08:33:09,066 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-19 08:33:09,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:09,067 INFO L225 Difference]: With dead ends: 60 [2022-03-19 08:33:09,067 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 08:33:09,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=796, Invalid=1184, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 08:33:09,068 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:09,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:09,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 08:33:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-19 08:33:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-03-19 08:33:09,071 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2022-03-19 08:33:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:09,071 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-03-19 08:33:09,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-03-19 08:33:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 08:33:09,071 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:09,071 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:09,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:09,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37,SelfDestructingSolverStorable38 [2022-03-19 08:33:09,272 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:09,272 INFO L85 PathProgramCache]: Analyzing trace with hash 438324421, now seen corresponding path program 37 times [2022-03-19 08:33:09,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:09,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1423553807] [2022-03-19 08:33:09,405 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:09,405 INFO L85 PathProgramCache]: Analyzing trace with hash -86151920, now seen corresponding path program 1 times [2022-03-19 08:33:09,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:09,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946183003] [2022-03-19 08:33:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:09,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:09,410 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:09,414 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash 438324421, now seen corresponding path program 38 times [2022-03-19 08:33:09,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:09,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403209464] [2022-03-19 08:33:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:09,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:09,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:09,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:09,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403209464] [2022-03-19 08:33:09,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403209464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:09,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960040636] [2022-03-19 08:33:09,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:09,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:09,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:09,548 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) [2022-03-19 08:33:09,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 08:33:09,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:09,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:09,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 08:33:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:09,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:09,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960040636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:09,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:09,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-19 08:33:09,966 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:09,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1423553807] [2022-03-19 08:33:09,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1423553807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:09,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:09,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 08:33:09,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238236046] [2022-03-19 08:33:09,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:09,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 08:33:09,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:09,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 08:33:09,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 08:33:09,968 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:10,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:10,124 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-03-19 08:33:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 08:33:10,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-19 08:33:10,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:10,125 INFO L225 Difference]: With dead ends: 62 [2022-03-19 08:33:10,125 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 08:33:10,126 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 08:33:10,127 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:10,127 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 08:33:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 08:33:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-03-19 08:33:10,137 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2022-03-19 08:33:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:10,138 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-03-19 08:33:10,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-03-19 08:33:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 08:33:10,138 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:10,138 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:10,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-19 08:33:10,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 08:33:10,355 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:10,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2059609310, now seen corresponding path program 39 times [2022-03-19 08:33:10,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:10,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2006526761] [2022-03-19 08:33:10,470 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash -27046576, now seen corresponding path program 1 times [2022-03-19 08:33:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:10,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400029308] [2022-03-19 08:33:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:10,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:10,476 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:10,481 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2059609310, now seen corresponding path program 40 times [2022-03-19 08:33:10,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:10,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999935224] [2022-03-19 08:33:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:10,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:10,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:10,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999935224] [2022-03-19 08:33:10,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999935224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924441234] [2022-03-19 08:33:10,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:10,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:10,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:10,709 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) [2022-03-19 08:33:10,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 08:33:10,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:10,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:10,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 08:33:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:10,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:11,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924441234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:11,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:11,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-19 08:33:11,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:11,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2006526761] [2022-03-19 08:33:11,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2006526761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:11,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:11,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 08:33:11,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86610427] [2022-03-19 08:33:11,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:11,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 08:33:11,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 08:33:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 08:33:11,319 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:11,498 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-03-19 08:33:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 08:33:11,498 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-19 08:33:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:11,499 INFO L225 Difference]: With dead ends: 64 [2022-03-19 08:33:11,499 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 08:33:11,500 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 08:33:11,503 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:11,503 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:11,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 08:33:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-19 08:33:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-03-19 08:33:11,506 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 53 [2022-03-19 08:33:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:11,507 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-03-19 08:33:11,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-03-19 08:33:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 08:33:11,508 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:11,508 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:11,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-19 08:33:11,723 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,SelfDestructingSolverStorable41,SelfDestructingSolverStorable42 [2022-03-19 08:33:11,723 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1687206337, now seen corresponding path program 41 times [2022-03-19 08:33:11,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:11,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [856787450] [2022-03-19 08:33:11,914 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:11,915 INFO L85 PathProgramCache]: Analyzing trace with hash 32058768, now seen corresponding path program 1 times [2022-03-19 08:33:11,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:11,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505720906] [2022-03-19 08:33:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:11,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:11,918 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:11,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1687206337, now seen corresponding path program 42 times [2022-03-19 08:33:11,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:11,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066584798] [2022-03-19 08:33:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:11,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:12,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:12,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:12,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066584798] [2022-03-19 08:33:12,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066584798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:12,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296824443] [2022-03-19 08:33:12,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:12,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:12,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:12,088 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) [2022-03-19 08:33:12,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 08:33:12,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:12,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:12,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:12,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 08:33:12,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 08:33:12,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296824443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:12,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:12,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 29 [2022-03-19 08:33:12,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:12,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [856787450] [2022-03-19 08:33:12,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [856787450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:12,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:12,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 08:33:12,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291591967] [2022-03-19 08:33:12,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:12,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 08:33:12,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 08:33:12,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-03-19 08:33:12,232 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:12,416 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-03-19 08:33:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 08:33:12,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-19 08:33:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:12,416 INFO L225 Difference]: With dead ends: 66 [2022-03-19 08:33:12,416 INFO L226 Difference]: Without dead ends: 59 [2022-03-19 08:33:12,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1018, Invalid=1532, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 08:33:12,418 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:12,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 49 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-19 08:33:12,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-19 08:33:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-03-19 08:33:12,430 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2022-03-19 08:33:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:12,430 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-03-19 08:33:12,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-03-19 08:33:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 08:33:12,431 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:12,431 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:12,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:12,645 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,SelfDestructingSolverStorable43,SelfDestructingSolverStorable44 [2022-03-19 08:33:12,645 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:12,645 INFO L85 PathProgramCache]: Analyzing trace with hash -290234852, now seen corresponding path program 43 times [2022-03-19 08:33:12,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:12,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2092830061] [2022-03-19 08:33:12,795 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash 91164112, now seen corresponding path program 1 times [2022-03-19 08:33:12,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:12,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595240597] [2022-03-19 08:33:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:12,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:12,799 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:12,817 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash -290234852, now seen corresponding path program 44 times [2022-03-19 08:33:12,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:12,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457786301] [2022-03-19 08:33:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:12,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:12,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:12,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:12,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457786301] [2022-03-19 08:33:12,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457786301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:12,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013571744] [2022-03-19 08:33:12,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:12,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:12,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:12,978 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) [2022-03-19 08:33:12,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 08:33:13,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:13,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:13,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 08:33:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:13,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:13,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013571744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:13,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:13,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-19 08:33:13,450 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:13,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2092830061] [2022-03-19 08:33:13,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2092830061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:13,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:13,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 08:33:13,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902556612] [2022-03-19 08:33:13,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:13,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 08:33:13,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:13,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 08:33:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 08:33:13,452 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:13,666 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-03-19 08:33:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 08:33:13,666 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-19 08:33:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:13,666 INFO L225 Difference]: With dead ends: 68 [2022-03-19 08:33:13,666 INFO L226 Difference]: Without dead ends: 61 [2022-03-19 08:33:13,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 08:33:13,671 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:13,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-19 08:33:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-19 08:33:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-03-19 08:33:13,678 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2022-03-19 08:33:13,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:13,679 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-03-19 08:33:13,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:13,679 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-03-19 08:33:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 08:33:13,680 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:13,680 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:13,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:13,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,SelfDestructingSolverStorable46,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:13,894 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:13,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:13,895 INFO L85 PathProgramCache]: Analyzing trace with hash -2125401415, now seen corresponding path program 45 times [2022-03-19 08:33:13,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:13,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [151970675] [2022-03-19 08:33:13,979 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:13,979 INFO L85 PathProgramCache]: Analyzing trace with hash 150269456, now seen corresponding path program 1 times [2022-03-19 08:33:13,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:13,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183013749] [2022-03-19 08:33:13,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:13,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:13,990 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:14,004 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:14,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2125401415, now seen corresponding path program 46 times [2022-03-19 08:33:14,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:14,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784097580] [2022-03-19 08:33:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:14,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:14,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:14,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:14,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784097580] [2022-03-19 08:33:14,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784097580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:14,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422768130] [2022-03-19 08:33:14,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:14,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:14,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:14,246 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) [2022-03-19 08:33:14,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 08:33:14,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:14,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:14,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 08:33:14,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:14,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:14,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422768130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:14,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:14,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-19 08:33:14,719 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:14,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [151970675] [2022-03-19 08:33:14,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [151970675] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:14,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:14,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 08:33:14,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296324437] [2022-03-19 08:33:14,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:14,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 08:33:14,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:14,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 08:33:14,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 08:33:14,720 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:14,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:14,906 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-03-19 08:33:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 08:33:14,907 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-19 08:33:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:14,907 INFO L225 Difference]: With dead ends: 70 [2022-03-19 08:33:14,907 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 08:33:14,908 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 08:33:14,908 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:14,910 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 19 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 08:33:14,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-19 08:33:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-03-19 08:33:14,914 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 59 [2022-03-19 08:33:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:14,914 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-03-19 08:33:14,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-03-19 08:33:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 08:33:14,915 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:14,915 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:14,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:15,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,SelfDestructingSolverStorable48,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:15,127 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:15,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:15,128 INFO L85 PathProgramCache]: Analyzing trace with hash -488909802, now seen corresponding path program 47 times [2022-03-19 08:33:15,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:15,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045021415] [2022-03-19 08:33:15,251 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:15,252 INFO L85 PathProgramCache]: Analyzing trace with hash 209374800, now seen corresponding path program 1 times [2022-03-19 08:33:15,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:15,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922440740] [2022-03-19 08:33:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:15,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:15,255 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:15,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:15,259 INFO L85 PathProgramCache]: Analyzing trace with hash -488909802, now seen corresponding path program 48 times [2022-03-19 08:33:15,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:15,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573337433] [2022-03-19 08:33:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:15,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:15,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:15,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:15,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573337433] [2022-03-19 08:33:15,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573337433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:15,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549895220] [2022-03-19 08:33:15,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:15,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:15,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:15,504 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) [2022-03-19 08:33:15,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 08:33:15,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:15,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:15,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:15,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-19 08:33:15,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-19 08:33:15,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549895220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:15,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:15,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 32 [2022-03-19 08:33:15,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:15,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1045021415] [2022-03-19 08:33:15,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1045021415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:15,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:15,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 08:33:15,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661589948] [2022-03-19 08:33:15,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:15,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 08:33:15,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:15,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 08:33:15,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-19 08:33:15,747 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:16,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:16,073 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-03-19 08:33:16,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 08:33:16,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-19 08:33:16,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:16,074 INFO L225 Difference]: With dead ends: 72 [2022-03-19 08:33:16,074 INFO L226 Difference]: Without dead ends: 65 [2022-03-19 08:33:16,075 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1267, Invalid=1925, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 08:33:16,075 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:16,075 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 29 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-19 08:33:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-19 08:33:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-03-19 08:33:16,078 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2022-03-19 08:33:16,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:16,078 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-03-19 08:33:16,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:16,078 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-03-19 08:33:16,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 08:33:16,078 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:16,078 INFO L500 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:16,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:16,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 08:33:16,287 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:16,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:16,288 INFO L85 PathProgramCache]: Analyzing trace with hash 221499955, now seen corresponding path program 49 times [2022-03-19 08:33:16,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:16,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2064900579] [2022-03-19 08:33:16,453 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash 268480144, now seen corresponding path program 1 times [2022-03-19 08:33:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:16,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683584461] [2022-03-19 08:33:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:16,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:16,456 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:16,458 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:16,458 INFO L85 PathProgramCache]: Analyzing trace with hash 221499955, now seen corresponding path program 50 times [2022-03-19 08:33:16,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:16,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172522944] [2022-03-19 08:33:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:16,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:16,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:16,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:16,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172522944] [2022-03-19 08:33:16,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172522944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:16,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583790050] [2022-03-19 08:33:16,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:16,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:16,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:16,735 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) [2022-03-19 08:33:16,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 08:33:16,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:16,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 08:33:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:16,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:17,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583790050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:17,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:17,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-19 08:33:17,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:17,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2064900579] [2022-03-19 08:33:17,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2064900579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:17,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:17,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 08:33:17,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549676902] [2022-03-19 08:33:17,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:17,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 08:33:17,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 08:33:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 08:33:17,444 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:17,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:17,798 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2022-03-19 08:33:17,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 08:33:17,798 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-19 08:33:17,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:17,799 INFO L225 Difference]: With dead ends: 74 [2022-03-19 08:33:17,799 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 08:33:17,800 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 08:33:17,800 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:17,800 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:17,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 08:33:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-19 08:33:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-03-19 08:33:17,803 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2022-03-19 08:33:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:17,803 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-03-19 08:33:17,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-03-19 08:33:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 08:33:17,803 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:17,803 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:17,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 08:33:18,011 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,SelfDestructingSolverStorable51,SelfDestructingSolverStorable52 [2022-03-19 08:33:18,011 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:18,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash 25476368, now seen corresponding path program 51 times [2022-03-19 08:33:18,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:18,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [66393778] [2022-03-19 08:33:18,176 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:18,176 INFO L85 PathProgramCache]: Analyzing trace with hash 327585488, now seen corresponding path program 1 times [2022-03-19 08:33:18,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:18,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166057596] [2022-03-19 08:33:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:18,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:18,178 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:18,180 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash 25476368, now seen corresponding path program 52 times [2022-03-19 08:33:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:18,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786637920] [2022-03-19 08:33:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:18,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:18,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:18,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786637920] [2022-03-19 08:33:18,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786637920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746548795] [2022-03-19 08:33:18,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:18,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:18,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:18,479 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) [2022-03-19 08:33:18,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 08:33:18,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:18,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:18,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 08:33:18,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:18,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:19,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746548795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:19,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:19,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-03-19 08:33:19,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:19,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [66393778] [2022-03-19 08:33:19,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [66393778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:19,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:19,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 08:33:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815705336] [2022-03-19 08:33:19,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:19,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 08:33:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:19,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 08:33:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 08:33:19,248 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:19,546 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-03-19 08:33:19,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 08:33:19,546 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-19 08:33:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:19,547 INFO L225 Difference]: With dead ends: 76 [2022-03-19 08:33:19,547 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 08:33:19,548 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-03-19 08:33:19,548 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:19,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 34 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:19,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 08:33:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-19 08:33:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-03-19 08:33:19,556 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2022-03-19 08:33:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:19,556 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-03-19 08:33:19,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-03-19 08:33:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 08:33:19,557 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:19,557 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:19,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:19,767 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,SelfDestructingSolverStorable53,SelfDestructingSolverStorable54 [2022-03-19 08:33:19,768 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:19,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:19,768 INFO L85 PathProgramCache]: Analyzing trace with hash 625370285, now seen corresponding path program 53 times [2022-03-19 08:33:19,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:19,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2098556557] [2022-03-19 08:33:19,902 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:19,902 INFO L85 PathProgramCache]: Analyzing trace with hash 386690832, now seen corresponding path program 1 times [2022-03-19 08:33:19,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:19,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971079982] [2022-03-19 08:33:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:19,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:19,905 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:19,907 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:19,907 INFO L85 PathProgramCache]: Analyzing trace with hash 625370285, now seen corresponding path program 54 times [2022-03-19 08:33:19,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:19,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338000121] [2022-03-19 08:33:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:19,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:20,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:20,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:20,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338000121] [2022-03-19 08:33:20,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338000121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:20,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916637797] [2022-03-19 08:33:20,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:20,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:20,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:20,236 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) [2022-03-19 08:33:20,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 08:33:20,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:20,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:20,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:20,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-19 08:33:20,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-19 08:33:20,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916637797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:20,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:20,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 4, 4] total 35 [2022-03-19 08:33:20,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:20,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2098556557] [2022-03-19 08:33:20,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2098556557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:20,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:20,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 08:33:20,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137790191] [2022-03-19 08:33:20,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:20,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 08:33:20,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:20,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 08:33:20,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 08:33:20,467 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:20,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:20,864 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-03-19 08:33:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 08:33:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-19 08:33:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:20,865 INFO L225 Difference]: With dead ends: 78 [2022-03-19 08:33:20,865 INFO L226 Difference]: Without dead ends: 71 [2022-03-19 08:33:20,865 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1543, Invalid=2363, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 08:33:20,866 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:20,866 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-19 08:33:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-19 08:33:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-03-19 08:33:20,869 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2022-03-19 08:33:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:20,870 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-03-19 08:33:20,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-03-19 08:33:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 08:33:20,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:20,870 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:20,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:21,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-19 08:33:21,079 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1597806858, now seen corresponding path program 55 times [2022-03-19 08:33:21,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:21,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1345755247] [2022-03-19 08:33:21,271 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:21,271 INFO L85 PathProgramCache]: Analyzing trace with hash 445796176, now seen corresponding path program 1 times [2022-03-19 08:33:21,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:21,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588910410] [2022-03-19 08:33:21,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:21,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:21,274 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:21,278 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:21,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1597806858, now seen corresponding path program 56 times [2022-03-19 08:33:21,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:21,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592134268] [2022-03-19 08:33:21,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:21,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:21,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:21,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592134268] [2022-03-19 08:33:21,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592134268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312989132] [2022-03-19 08:33:21,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:21,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:21,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:21,502 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) [2022-03-19 08:33:21,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 08:33:21,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:21,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:21,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 08:33:21,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:21,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:22,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312989132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:22,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:22,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-19 08:33:22,169 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:22,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1345755247] [2022-03-19 08:33:22,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1345755247] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:22,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:22,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 08:33:22,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329949373] [2022-03-19 08:33:22,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:22,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 08:33:22,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 08:33:22,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 08:33:22,170 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:22,601 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-03-19 08:33:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 08:33:22,601 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-19 08:33:22,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:22,601 INFO L225 Difference]: With dead ends: 80 [2022-03-19 08:33:22,601 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 08:33:22,603 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-19 08:33:22,604 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:22,604 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:22,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 08:33:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-19 08:33:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-03-19 08:33:22,607 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2022-03-19 08:33:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:22,607 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-03-19 08:33:22,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-03-19 08:33:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 08:33:22,607 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:22,607 INFO L500 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:22,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-19 08:33:22,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,SelfDestructingSolverStorable58,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:22,808 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:22,808 INFO L85 PathProgramCache]: Analyzing trace with hash -193517017, now seen corresponding path program 57 times [2022-03-19 08:33:22,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:22,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1372654824] [2022-03-19 08:33:22,954 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash 504901520, now seen corresponding path program 1 times [2022-03-19 08:33:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:22,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318387834] [2022-03-19 08:33:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:22,963 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:22,967 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash -193517017, now seen corresponding path program 58 times [2022-03-19 08:33:22,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:22,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256868654] [2022-03-19 08:33:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:22,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:23,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:23,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:23,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256868654] [2022-03-19 08:33:23,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256868654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:23,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441839738] [2022-03-19 08:33:23,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:23,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:23,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:23,237 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) [2022-03-19 08:33:23,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 08:33:23,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:23,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:23,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 08:33:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:23,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:24,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441839738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:24,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:24,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-19 08:33:24,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:24,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1372654824] [2022-03-19 08:33:24,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1372654824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:24,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:24,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-19 08:33:24,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824857932] [2022-03-19 08:33:24,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:24,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 08:33:24,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:24,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 08:33:24,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 08:33:24,152 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:24,532 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-03-19 08:33:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 08:33:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-19 08:33:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:24,533 INFO L225 Difference]: With dead ends: 82 [2022-03-19 08:33:24,533 INFO L226 Difference]: Without dead ends: 75 [2022-03-19 08:33:24,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 08:33:24,534 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:24,534 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:24,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-19 08:33:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-19 08:33:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-03-19 08:33:24,537 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 71 [2022-03-19 08:33:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:24,537 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-03-19 08:33:24,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-03-19 08:33:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 08:33:24,538 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:24,538 INFO L500 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:24,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-19 08:33:24,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-19 08:33:24,738 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:24,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:24,739 INFO L85 PathProgramCache]: Analyzing trace with hash 626124804, now seen corresponding path program 59 times [2022-03-19 08:33:24,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:24,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [466125967] [2022-03-19 08:33:24,861 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:24,861 INFO L85 PathProgramCache]: Analyzing trace with hash 564006864, now seen corresponding path program 1 times [2022-03-19 08:33:24,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:24,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670634532] [2022-03-19 08:33:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:24,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:24,864 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:24,865 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash 626124804, now seen corresponding path program 60 times [2022-03-19 08:33:24,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:24,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883897777] [2022-03-19 08:33:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:24,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:25,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:25,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:25,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883897777] [2022-03-19 08:33:25,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883897777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:25,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829389628] [2022-03-19 08:33:25,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:25,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:25,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:25,104 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) [2022-03-19 08:33:25,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 08:33:25,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:25,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:25,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:25,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-19 08:33:25,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-19 08:33:25,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829389628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:25,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:25,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 4, 4] total 38 [2022-03-19 08:33:25,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:25,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [466125967] [2022-03-19 08:33:25,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [466125967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:25,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:25,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 08:33:25,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017245730] [2022-03-19 08:33:25,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:25,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 08:33:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 08:33:25,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 08:33:25,299 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:25,589 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-03-19 08:33:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 08:33:25,590 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-03-19 08:33:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:25,593 INFO L225 Difference]: With dead ends: 84 [2022-03-19 08:33:25,593 INFO L226 Difference]: Without dead ends: 77 [2022-03-19 08:33:25,594 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1846, Invalid=2846, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 08:33:25,594 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:25,594 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 39 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-19 08:33:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-19 08:33:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-03-19 08:33:25,597 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2022-03-19 08:33:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:25,598 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-03-19 08:33:25,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-03-19 08:33:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 08:33:25,598 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:25,598 INFO L500 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:25,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-19 08:33:25,814 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,SelfDestructingSolverStorable61,SelfDestructingSolverStorable62 [2022-03-19 08:33:25,814 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:25,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1972067679, now seen corresponding path program 61 times [2022-03-19 08:33:25,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:25,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107463259] [2022-03-19 08:33:25,947 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:25,947 INFO L85 PathProgramCache]: Analyzing trace with hash 623112208, now seen corresponding path program 1 times [2022-03-19 08:33:25,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:25,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431983913] [2022-03-19 08:33:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:25,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:25,951 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:25,966 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:25,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1972067679, now seen corresponding path program 62 times [2022-03-19 08:33:25,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:25,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214968236] [2022-03-19 08:33:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:26,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:26,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:26,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214968236] [2022-03-19 08:33:26,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214968236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:26,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500566788] [2022-03-19 08:33:26,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:26,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:26,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:26,209 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) [2022-03-19 08:33:26,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 08:33:26,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:26,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:26,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 08:33:26,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:26,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:27,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500566788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:27,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:27,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-19 08:33:27,096 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:27,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107463259] [2022-03-19 08:33:27,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107463259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:27,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:27,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-19 08:33:27,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590720154] [2022-03-19 08:33:27,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:27,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 08:33:27,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 08:33:27,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 08:33:27,097 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:27,459 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-03-19 08:33:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 08:33:27,459 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-19 08:33:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:27,460 INFO L225 Difference]: With dead ends: 86 [2022-03-19 08:33:27,460 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 08:33:27,461 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 08:33:27,461 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:27,461 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:27,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 08:33:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-19 08:33:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-03-19 08:33:27,464 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2022-03-19 08:33:27,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:27,464 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-03-19 08:33:27,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-03-19 08:33:27,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 08:33:27,465 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:27,465 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:27,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:27,681 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,SelfDestructingSolverStorable64,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:27,681 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:27,681 INFO L85 PathProgramCache]: Analyzing trace with hash 835922430, now seen corresponding path program 63 times [2022-03-19 08:33:27,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:27,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1421367683] [2022-03-19 08:33:27,846 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash 682217552, now seen corresponding path program 1 times [2022-03-19 08:33:27,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:27,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087457341] [2022-03-19 08:33:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:27,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:27,849 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:27,851 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:27,851 INFO L85 PathProgramCache]: Analyzing trace with hash 835922430, now seen corresponding path program 64 times [2022-03-19 08:33:27,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:27,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093786428] [2022-03-19 08:33:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:27,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:28,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:28,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:28,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093786428] [2022-03-19 08:33:28,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093786428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216303060] [2022-03-19 08:33:28,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:28,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:28,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:28,259 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) [2022-03-19 08:33:28,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 08:33:28,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:28,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:28,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 08:33:28,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:28,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:29,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216303060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:29,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:29,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-19 08:33:29,340 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:29,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1421367683] [2022-03-19 08:33:29,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1421367683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:29,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:29,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 08:33:29,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80066738] [2022-03-19 08:33:29,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:29,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 08:33:29,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:29,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 08:33:29,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 08:33:29,341 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:29,707 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-03-19 08:33:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 08:33:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-19 08:33:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:29,712 INFO L225 Difference]: With dead ends: 88 [2022-03-19 08:33:29,713 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 08:33:29,715 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4626, Invalid=5880, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 08:33:29,716 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:29,716 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 34 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 08:33:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 08:33:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-19 08:33:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-03-19 08:33:29,730 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2022-03-19 08:33:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:29,730 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-03-19 08:33:29,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-03-19 08:33:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 08:33:29,736 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:29,736 INFO L500 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:29,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-19 08:33:29,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,SelfDestructingSolverStorable66,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:29,953 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:29,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2074955291, now seen corresponding path program 65 times [2022-03-19 08:33:29,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:29,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [631779517] [2022-03-19 08:33:30,103 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash 741322896, now seen corresponding path program 1 times [2022-03-19 08:33:30,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:30,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395284517] [2022-03-19 08:33:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:30,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:30,106 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:30,108 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:30,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2074955291, now seen corresponding path program 66 times [2022-03-19 08:33:30,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:30,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514774535] [2022-03-19 08:33:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:30,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:30,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:30,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:30,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514774535] [2022-03-19 08:33:30,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514774535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:30,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768283127] [2022-03-19 08:33:30,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:30,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:30,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:30,523 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) [2022-03-19 08:33:30,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 08:33:30,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:30,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:30,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:30,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-19 08:33:30,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-19 08:33:30,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768283127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:30,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:30,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 4, 4] total 41 [2022-03-19 08:33:30,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:30,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [631779517] [2022-03-19 08:33:30,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [631779517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:30,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:30,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-19 08:33:30,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045711065] [2022-03-19 08:33:30,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:30,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 08:33:30,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:30,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 08:33:30,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 08:33:30,712 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:31,100 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-03-19 08:33:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 08:33:31,101 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-19 08:33:31,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:31,101 INFO L225 Difference]: With dead ends: 90 [2022-03-19 08:33:31,101 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 08:33:31,102 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2176, Invalid=3374, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 08:33:31,102 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:31,102 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 29 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 08:33:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-19 08:33:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-03-19 08:33:31,105 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2022-03-19 08:33:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:31,105 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-03-19 08:33:31,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-03-19 08:33:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 08:33:31,106 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:31,106 INFO L500 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:31,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 08:33:31,321 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,SelfDestructingSolverStorable67,SelfDestructingSolverStorable68 [2022-03-19 08:33:31,322 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:31,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:31,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1215373576, now seen corresponding path program 67 times [2022-03-19 08:33:31,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:31,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [351803319] [2022-03-19 08:33:31,507 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:31,507 INFO L85 PathProgramCache]: Analyzing trace with hash 800428240, now seen corresponding path program 1 times [2022-03-19 08:33:31,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:31,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781091974] [2022-03-19 08:33:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:31,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:31,510 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:31,512 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1215373576, now seen corresponding path program 68 times [2022-03-19 08:33:31,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:31,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274988297] [2022-03-19 08:33:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:31,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:31,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:31,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:31,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274988297] [2022-03-19 08:33:31,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274988297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:31,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306691100] [2022-03-19 08:33:31,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:31,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:31,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:31,976 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) [2022-03-19 08:33:31,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 08:33:32,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:32,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:32,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 08:33:32,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:32,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:33,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306691100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:33,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:33,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-19 08:33:33,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:33,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [351803319] [2022-03-19 08:33:33,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [351803319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:33,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:33,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 08:33:33,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40174166] [2022-03-19 08:33:33,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:33,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 08:33:33,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:33,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 08:33:33,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 08:33:33,269 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:33,844 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-03-19 08:33:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 08:33:33,844 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-19 08:33:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:33,845 INFO L225 Difference]: With dead ends: 92 [2022-03-19 08:33:33,845 INFO L226 Difference]: Without dead ends: 85 [2022-03-19 08:33:33,846 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-19 08:33:33,847 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:33,847 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 19 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-19 08:33:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-19 08:33:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-03-19 08:33:33,850 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2022-03-19 08:33:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:33,850 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-03-19 08:33:33,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-03-19 08:33:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 08:33:33,851 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:33,851 INFO L500 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:33,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:34,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-19 08:33:34,051 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2125484907, now seen corresponding path program 69 times [2022-03-19 08:33:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:34,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2036445624] [2022-03-19 08:33:34,191 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:34,192 INFO L85 PathProgramCache]: Analyzing trace with hash 859533584, now seen corresponding path program 1 times [2022-03-19 08:33:34,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:34,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774898676] [2022-03-19 08:33:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:34,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:34,194 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:34,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:34,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2125484907, now seen corresponding path program 70 times [2022-03-19 08:33:34,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:34,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135102304] [2022-03-19 08:33:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:34,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:34,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:34,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135102304] [2022-03-19 08:33:34,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135102304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133433286] [2022-03-19 08:33:34,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:34,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:34,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:34,639 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) [2022-03-19 08:33:34,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 08:33:34,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:34,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 08:33:34,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:34,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:35,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133433286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:35,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:35,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-03-19 08:33:35,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:35,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2036445624] [2022-03-19 08:33:35,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2036445624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:35,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:35,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-19 08:33:35,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962540898] [2022-03-19 08:33:35,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:35,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 08:33:35,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:35,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 08:33:35,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 08:33:35,914 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:36,323 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-03-19 08:33:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 08:33:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-19 08:33:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:36,324 INFO L225 Difference]: With dead ends: 94 [2022-03-19 08:33:36,324 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 08:33:36,325 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5478, Invalid=6954, Unknown=0, NotChecked=0, Total=12432 [2022-03-19 08:33:36,325 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:36,325 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 08:33:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-19 08:33:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-03-19 08:33:36,329 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2022-03-19 08:33:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:36,330 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-03-19 08:33:36,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-03-19 08:33:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 08:33:36,330 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:36,330 INFO L500 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:36,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:36,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,SelfDestructingSolverStorable72,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:36,547 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:36,547 INFO L85 PathProgramCache]: Analyzing trace with hash -569145614, now seen corresponding path program 71 times [2022-03-19 08:33:36,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:36,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [503314556] [2022-03-19 08:33:36,688 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash 918638928, now seen corresponding path program 1 times [2022-03-19 08:33:36,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:36,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680338741] [2022-03-19 08:33:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:36,691 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:36,693 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash -569145614, now seen corresponding path program 72 times [2022-03-19 08:33:36,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:36,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440075945] [2022-03-19 08:33:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:36,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:37,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:37,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:37,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440075945] [2022-03-19 08:33:37,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440075945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:37,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108484869] [2022-03-19 08:33:37,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:37,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:37,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:37,010 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:37,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 08:33:37,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:37,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:37,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:37,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-19 08:33:37,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-19 08:33:37,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108484869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:37,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:37,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 4, 4] total 44 [2022-03-19 08:33:37,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:37,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [503314556] [2022-03-19 08:33:37,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [503314556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:37,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:37,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 08:33:37,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847181182] [2022-03-19 08:33:37,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:37,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 08:33:37,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:37,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 08:33:37,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 08:33:37,238 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:37,623 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2022-03-19 08:33:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 08:33:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-19 08:33:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:37,624 INFO L225 Difference]: With dead ends: 96 [2022-03-19 08:33:37,624 INFO L226 Difference]: Without dead ends: 89 [2022-03-19 08:33:37,625 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2533, Invalid=3947, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 08:33:37,628 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:37,628 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 44 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:37,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-19 08:33:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-19 08:33:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-03-19 08:33:37,633 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 85 [2022-03-19 08:33:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:37,633 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-03-19 08:33:37,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-03-19 08:33:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 08:33:37,634 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:37,634 INFO L500 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:37,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-19 08:33:37,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,SelfDestructingSolverStorable74,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:37,850 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:37,850 INFO L85 PathProgramCache]: Analyzing trace with hash 424295951, now seen corresponding path program 73 times [2022-03-19 08:33:37,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:37,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29287399] [2022-03-19 08:33:38,074 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:38,074 INFO L85 PathProgramCache]: Analyzing trace with hash 977744272, now seen corresponding path program 1 times [2022-03-19 08:33:38,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:38,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804586699] [2022-03-19 08:33:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:38,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:38,077 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:38,081 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:38,081 INFO L85 PathProgramCache]: Analyzing trace with hash 424295951, now seen corresponding path program 74 times [2022-03-19 08:33:38,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:38,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124027647] [2022-03-19 08:33:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:38,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:38,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:38,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:38,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124027647] [2022-03-19 08:33:38,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124027647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:38,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86900702] [2022-03-19 08:33:38,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:38,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:38,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:38,425 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:38,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 08:33:38,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:38,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:38,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 08:33:38,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:38,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:39,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86900702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:39,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:39,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-19 08:33:39,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:39,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29287399] [2022-03-19 08:33:39,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29287399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:39,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:39,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-19 08:33:39,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3218375] [2022-03-19 08:33:39,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:39,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 08:33:39,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 08:33:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 08:33:39,597 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:40,018 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-03-19 08:33:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 08:33:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-19 08:33:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:40,019 INFO L225 Difference]: With dead ends: 98 [2022-03-19 08:33:40,019 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 08:33:40,020 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 08:33:40,020 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:40,021 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 29 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 08:33:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-19 08:33:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-03-19 08:33:40,025 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2022-03-19 08:33:40,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:40,025 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-03-19 08:33:40,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-03-19 08:33:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 08:33:40,025 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:40,025 INFO L500 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:40,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:40,236 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,SelfDestructingSolverStorable76,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:40,236 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:40,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:40,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1638900204, now seen corresponding path program 75 times [2022-03-19 08:33:40,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:40,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1566378184] [2022-03-19 08:33:40,374 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:40,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1036849616, now seen corresponding path program 1 times [2022-03-19 08:33:40,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:40,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141113346] [2022-03-19 08:33:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:40,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:40,377 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:40,391 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:40,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1638900204, now seen corresponding path program 76 times [2022-03-19 08:33:40,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:40,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994661941] [2022-03-19 08:33:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:40,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:40,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:40,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:40,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994661941] [2022-03-19 08:33:40,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994661941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:40,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16880550] [2022-03-19 08:33:40,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:40,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:40,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:40,900 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:40,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 08:33:40,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:40,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:40,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 08:33:40,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:41,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:41,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16880550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:41,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:41,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-03-19 08:33:41,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:41,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1566378184] [2022-03-19 08:33:41,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1566378184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:41,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:41,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 08:33:41,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372450014] [2022-03-19 08:33:41,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:41,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 08:33:41,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:41,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 08:33:41,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 08:33:41,996 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:42,689 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-03-19 08:33:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 08:33:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-19 08:33:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:42,690 INFO L225 Difference]: With dead ends: 100 [2022-03-19 08:33:42,690 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 08:33:42,691 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6402, Invalid=8118, Unknown=0, NotChecked=0, Total=14520 [2022-03-19 08:33:42,692 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:42,692 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 08:33:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-19 08:33:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-03-19 08:33:42,695 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 89 [2022-03-19 08:33:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:42,695 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-03-19 08:33:42,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:42,695 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-03-19 08:33:42,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 08:33:42,696 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:42,696 INFO L500 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:42,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:42,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77,SelfDestructingSolverStorable78 [2022-03-19 08:33:42,903 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:42,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:42,904 INFO L85 PathProgramCache]: Analyzing trace with hash 642482825, now seen corresponding path program 77 times [2022-03-19 08:33:42,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:42,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1827456586] [2022-03-19 08:33:43,044 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1095954960, now seen corresponding path program 1 times [2022-03-19 08:33:43,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:43,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615444012] [2022-03-19 08:33:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:43,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:43,047 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:43,049 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:43,049 INFO L85 PathProgramCache]: Analyzing trace with hash 642482825, now seen corresponding path program 78 times [2022-03-19 08:33:43,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:43,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805702538] [2022-03-19 08:33:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:43,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:43,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:43,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:43,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805702538] [2022-03-19 08:33:43,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805702538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:43,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614855561] [2022-03-19 08:33:43,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:43,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:43,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:43,431 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:43,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 08:33:43,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:43,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:43,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-19 08:33:43,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-19 08:33:43,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614855561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:43,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:43,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 4, 4] total 47 [2022-03-19 08:33:43,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:43,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1827456586] [2022-03-19 08:33:43,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1827456586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:43,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:43,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-19 08:33:43,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437838890] [2022-03-19 08:33:43,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:43,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 08:33:43,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:43,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 08:33:43,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 08:33:43,737 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:44,471 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2022-03-19 08:33:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 08:33:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-03-19 08:33:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:44,472 INFO L225 Difference]: With dead ends: 102 [2022-03-19 08:33:44,472 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 08:33:44,472 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2917, Invalid=4565, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 08:33:44,472 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:44,473 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 49 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 08:33:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-19 08:33:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-03-19 08:33:44,476 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 91 [2022-03-19 08:33:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:44,476 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-03-19 08:33:44,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-03-19 08:33:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 08:33:44,476 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:44,477 INFO L500 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:44,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:44,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-19 08:33:44,684 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash 863088614, now seen corresponding path program 79 times [2022-03-19 08:33:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:44,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1272962127] [2022-03-19 08:33:44,812 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:44,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1155060304, now seen corresponding path program 1 times [2022-03-19 08:33:44,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:44,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848008566] [2022-03-19 08:33:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:44,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:44,815 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:44,817 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash 863088614, now seen corresponding path program 80 times [2022-03-19 08:33:44,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:44,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283811948] [2022-03-19 08:33:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:44,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:45,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:45,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:45,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283811948] [2022-03-19 08:33:45,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283811948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:45,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303255135] [2022-03-19 08:33:45,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:45,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:45,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:45,347 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:45,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 08:33:45,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:45,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:45,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 08:33:45,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:45,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:46,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303255135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:46,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:46,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-19 08:33:46,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:46,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1272962127] [2022-03-19 08:33:46,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1272962127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:46,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:46,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 08:33:46,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461824352] [2022-03-19 08:33:46,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:46,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 08:33:46,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 08:33:46,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 08:33:46,790 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:47,420 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2022-03-19 08:33:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 08:33:47,420 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-19 08:33:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:47,420 INFO L225 Difference]: With dead ends: 104 [2022-03-19 08:33:47,421 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 08:33:47,423 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-19 08:33:47,425 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:47,426 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 08:33:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-19 08:33:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-03-19 08:33:47,429 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 93 [2022-03-19 08:33:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:47,430 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-03-19 08:33:47,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-03-19 08:33:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 08:33:47,430 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:47,430 INFO L500 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:47,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-19 08:33:47,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81,SelfDestructingSolverStorable82 [2022-03-19 08:33:47,643 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1883112957, now seen corresponding path program 81 times [2022-03-19 08:33:47,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:47,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [138321814] [2022-03-19 08:33:47,763 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1214165648, now seen corresponding path program 1 times [2022-03-19 08:33:47,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:47,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312774743] [2022-03-19 08:33:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:47,768 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:47,770 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1883112957, now seen corresponding path program 82 times [2022-03-19 08:33:47,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:47,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966144639] [2022-03-19 08:33:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:47,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:48,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:48,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:48,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966144639] [2022-03-19 08:33:48,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966144639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:48,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399095122] [2022-03-19 08:33:48,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:48,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:48,296 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:48,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 08:33:48,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:48,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:48,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 08:33:48,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:48,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:49,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399095122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:49,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:49,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-03-19 08:33:49,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:49,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [138321814] [2022-03-19 08:33:49,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [138321814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:49,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:49,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-19 08:33:49,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462935641] [2022-03-19 08:33:49,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:49,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 08:33:49,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:49,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 08:33:49,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 08:33:49,929 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:50,419 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-03-19 08:33:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 08:33:50,419 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-19 08:33:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:50,419 INFO L225 Difference]: With dead ends: 106 [2022-03-19 08:33:50,419 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 08:33:50,421 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7398, Invalid=9372, Unknown=0, NotChecked=0, Total=16770 [2022-03-19 08:33:50,421 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:50,421 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 24 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 08:33:50,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-19 08:33:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2022-03-19 08:33:50,424 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 95 [2022-03-19 08:33:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:50,425 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2022-03-19 08:33:50,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:50,425 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2022-03-19 08:33:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 08:33:50,425 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:50,425 INFO L500 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:50,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:50,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,SelfDestructingSolverStorable84,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:50,642 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:50,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:50,642 INFO L85 PathProgramCache]: Analyzing trace with hash 422064352, now seen corresponding path program 83 times [2022-03-19 08:33:50,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:50,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1354075999] [2022-03-19 08:33:50,771 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:50,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1273270992, now seen corresponding path program 1 times [2022-03-19 08:33:50,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:50,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318189245] [2022-03-19 08:33:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:50,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:50,778 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:50,780 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:50,780 INFO L85 PathProgramCache]: Analyzing trace with hash 422064352, now seen corresponding path program 84 times [2022-03-19 08:33:50,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:50,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041156206] [2022-03-19 08:33:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:50,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:51,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:51,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:51,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041156206] [2022-03-19 08:33:51,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041156206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:51,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763014594] [2022-03-19 08:33:51,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:51,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:51,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:51,335 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:51,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 08:33:51,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:51,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-19 08:33:51,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-19 08:33:51,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763014594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:51,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:51,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 4, 4] total 50 [2022-03-19 08:33:51,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:51,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1354075999] [2022-03-19 08:33:51,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1354075999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:51,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:51,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-19 08:33:51,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921841378] [2022-03-19 08:33:51,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:51,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-19 08:33:51,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-19 08:33:51,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 08:33:51,672 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:52,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:52,181 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2022-03-19 08:33:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 08:33:52,181 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-03-19 08:33:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:52,185 INFO L225 Difference]: With dead ends: 108 [2022-03-19 08:33:52,185 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 08:33:52,186 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3328, Invalid=5228, Unknown=0, NotChecked=0, Total=8556 [2022-03-19 08:33:52,186 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:52,186 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:52,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 08:33:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-19 08:33:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-03-19 08:33:52,215 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2022-03-19 08:33:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:52,216 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-03-19 08:33:52,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-03-19 08:33:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 08:33:52,216 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:52,216 INFO L500 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:52,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:52,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,SelfDestructingSolverStorable86,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:52,433 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:52,433 INFO L85 PathProgramCache]: Analyzing trace with hash -505666435, now seen corresponding path program 85 times [2022-03-19 08:33:52,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:52,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [483605282] [2022-03-19 08:33:52,539 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:52,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1332376336, now seen corresponding path program 1 times [2022-03-19 08:33:52,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:52,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502581185] [2022-03-19 08:33:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:52,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:52,565 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:52,568 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:52,568 INFO L85 PathProgramCache]: Analyzing trace with hash -505666435, now seen corresponding path program 86 times [2022-03-19 08:33:52,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:52,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404508595] [2022-03-19 08:33:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:52,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:52,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:52,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:52,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404508595] [2022-03-19 08:33:52,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404508595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:52,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411365441] [2022-03-19 08:33:52,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:33:52,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:52,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:52,974 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:52,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 08:33:53,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:33:53,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:53,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 08:33:53,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:53,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:54,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411365441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:54,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:54,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-19 08:33:54,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:54,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [483605282] [2022-03-19 08:33:54,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [483605282] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:54,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:54,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-19 08:33:54,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177048041] [2022-03-19 08:33:54,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:54,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 08:33:54,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:54,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 08:33:54,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 08:33:54,244 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:54,797 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2022-03-19 08:33:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 08:33:54,797 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-03-19 08:33:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:54,797 INFO L225 Difference]: With dead ends: 110 [2022-03-19 08:33:54,797 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 08:33:54,799 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-19 08:33:54,799 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:54,800 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 24 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 08:33:54,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-19 08:33:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-03-19 08:33:54,803 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 99 [2022-03-19 08:33:54,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:54,803 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-03-19 08:33:54,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:54,804 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-03-19 08:33:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 08:33:54,804 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:54,804 INFO L500 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:54,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:55,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87,SelfDestructingSolverStorable88 [2022-03-19 08:33:55,021 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:55,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1298244826, now seen corresponding path program 87 times [2022-03-19 08:33:55,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:55,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1778193872] [2022-03-19 08:33:55,246 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1391481680, now seen corresponding path program 1 times [2022-03-19 08:33:55,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:55,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054052844] [2022-03-19 08:33:55,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:55,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:55,254 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:55,256 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:55,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1298244826, now seen corresponding path program 88 times [2022-03-19 08:33:55,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:55,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179171135] [2022-03-19 08:33:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:55,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:55,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:55,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:55,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179171135] [2022-03-19 08:33:55,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179171135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:55,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490705005] [2022-03-19 08:33:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:33:55,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:55,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:55,794 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:55,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 08:33:55,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:33:55,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:55,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 08:33:55,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:55,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:57,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490705005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:57,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:57,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-03-19 08:33:57,749 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:57,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1778193872] [2022-03-19 08:33:57,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1778193872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:57,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:57,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-19 08:33:57,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500454431] [2022-03-19 08:33:57,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:57,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-19 08:33:57,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:57,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-19 08:33:57,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 08:33:57,750 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:33:58,614 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-03-19 08:33:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 08:33:58,614 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-03-19 08:33:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:33:58,615 INFO L225 Difference]: With dead ends: 112 [2022-03-19 08:33:58,615 INFO L226 Difference]: Without dead ends: 105 [2022-03-19 08:33:58,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8466, Invalid=10716, Unknown=0, NotChecked=0, Total=19182 [2022-03-19 08:33:58,620 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:33:58,620 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 34 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:33:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-19 08:33:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-03-19 08:33:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-03-19 08:33:58,624 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 101 [2022-03-19 08:33:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:33:58,624 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-03-19 08:33:58,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:33:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-03-19 08:33:58,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 08:33:58,624 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:33:58,625 INFO L500 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:33:58,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 08:33:58,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-19 08:33:58,841 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:33:58,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:33:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash -309820937, now seen corresponding path program 89 times [2022-03-19 08:33:58,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:58,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [772569572] [2022-03-19 08:33:59,027 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:33:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1450587024, now seen corresponding path program 1 times [2022-03-19 08:33:59,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:59,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731581634] [2022-03-19 08:33:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:59,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:59,029 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:33:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:33:59,034 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:33:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash -309820937, now seen corresponding path program 90 times [2022-03-19 08:33:59,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:33:59,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081488977] [2022-03-19 08:33:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:33:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:33:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:59,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:33:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:33:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:33:59,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:33:59,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081488977] [2022-03-19 08:33:59,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081488977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:33:59,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636050010] [2022-03-19 08:33:59,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:33:59,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:33:59,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:33:59,777 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:33:59,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 08:33:59,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:33:59,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:33:59,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:33:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:33:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-03-19 08:33:59,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:33:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-03-19 08:33:59,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636050010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:33:59,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:33:59,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 53 [2022-03-19 08:33:59,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:33:59,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [772569572] [2022-03-19 08:33:59,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [772569572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:33:59,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:33:59,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-19 08:33:59,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440759435] [2022-03-19 08:33:59,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:33:59,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 08:33:59,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:33:59,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 08:33:59,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 08:33:59,987 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:00,566 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2022-03-19 08:34:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 08:34:00,566 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-03-19 08:34:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:00,567 INFO L225 Difference]: With dead ends: 114 [2022-03-19 08:34:00,567 INFO L226 Difference]: Without dead ends: 107 [2022-03-19 08:34:00,569 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3766, Invalid=5936, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 08:34:00,569 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:00,569 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 39 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:00,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-19 08:34:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-03-19 08:34:00,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2022-03-19 08:34:00,582 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 103 [2022-03-19 08:34:00,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:00,582 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2022-03-19 08:34:00,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2022-03-19 08:34:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 08:34:00,582 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:00,583 INFO L500 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:00,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-19 08:34:00,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,SelfDestructingSolverStorable92,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:00,801 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:00,802 INFO L85 PathProgramCache]: Analyzing trace with hash 527207380, now seen corresponding path program 91 times [2022-03-19 08:34:00,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:00,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [828780232] [2022-03-19 08:34:00,895 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:00,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1509692368, now seen corresponding path program 1 times [2022-03-19 08:34:00,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:00,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333465863] [2022-03-19 08:34:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:00,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:00,901 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:00,916 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash 527207380, now seen corresponding path program 92 times [2022-03-19 08:34:00,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:00,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006742148] [2022-03-19 08:34:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:00,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:01,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:01,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:01,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006742148] [2022-03-19 08:34:01,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006742148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:01,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691228258] [2022-03-19 08:34:01,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:34:01,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:01,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:01,590 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:01,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 08:34:01,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:34:01,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:01,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 08:34:01,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:01,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:02,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691228258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:02,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:02,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-19 08:34:02,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:02,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [828780232] [2022-03-19 08:34:02,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [828780232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:02,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:02,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-19 08:34:02,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874650381] [2022-03-19 08:34:02,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:02,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 08:34:02,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:02,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 08:34:02,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 08:34:02,979 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:03,580 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-03-19 08:34:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 08:34:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-03-19 08:34:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:03,596 INFO L225 Difference]: With dead ends: 116 [2022-03-19 08:34:03,596 INFO L226 Difference]: Without dead ends: 109 [2022-03-19 08:34:03,598 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-19 08:34:03,598 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:03,598 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:03,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-19 08:34:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-19 08:34:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-03-19 08:34:03,608 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 105 [2022-03-19 08:34:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:03,608 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-03-19 08:34:03,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-03-19 08:34:03,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 08:34:03,608 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:03,608 INFO L500 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:03,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:03,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,SelfDestructingSolverStorable94,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:03,825 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:03,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1752535665, now seen corresponding path program 93 times [2022-03-19 08:34:03,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:03,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1363442136] [2022-03-19 08:34:04,012 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:04,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1568797712, now seen corresponding path program 1 times [2022-03-19 08:34:04,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:04,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883729794] [2022-03-19 08:34:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:04,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:04,015 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:04,017 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:04,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1752535665, now seen corresponding path program 94 times [2022-03-19 08:34:04,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:04,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751409789] [2022-03-19 08:34:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:04,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:04,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:04,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:04,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751409789] [2022-03-19 08:34:04,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751409789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:04,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605553276] [2022-03-19 08:34:04,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:34:04,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:04,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:04,508 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:04,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 08:34:04,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:34:04,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:04,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 08:34:04,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:04,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:05,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605553276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:05,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:05,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-03-19 08:34:05,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:05,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1363442136] [2022-03-19 08:34:05,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1363442136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:05,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:05,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-19 08:34:05,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166951205] [2022-03-19 08:34:05,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:05,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 08:34:05,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 08:34:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 08:34:05,947 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:06,841 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-03-19 08:34:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 08:34:06,841 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-03-19 08:34:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:06,842 INFO L225 Difference]: With dead ends: 118 [2022-03-19 08:34:06,842 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 08:34:06,844 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9606, Invalid=12150, Unknown=0, NotChecked=0, Total=21756 [2022-03-19 08:34:06,844 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:06,844 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 29 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 08:34:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-19 08:34:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-03-19 08:34:06,848 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2022-03-19 08:34:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:06,848 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-03-19 08:34:06,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-03-19 08:34:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-19 08:34:06,848 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:06,848 INFO L500 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:06,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:07,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,SelfDestructingSolverStorable96,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:07,067 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:07,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:07,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1822988850, now seen corresponding path program 95 times [2022-03-19 08:34:07,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:07,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970288124] [2022-03-19 08:34:07,215 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1627903056, now seen corresponding path program 1 times [2022-03-19 08:34:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475005029] [2022-03-19 08:34:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:07,218 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:07,219 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:07,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1822988850, now seen corresponding path program 96 times [2022-03-19 08:34:07,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:07,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527083421] [2022-03-19 08:34:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:07,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:08,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:08,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:08,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527083421] [2022-03-19 08:34:08,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527083421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487406277] [2022-03-19 08:34:08,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:34:08,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:08,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:08,040 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:08,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 08:34:08,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:34:08,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:34:08,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 1 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-03-19 08:34:08,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 1 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-03-19 08:34:08,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487406277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:08,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:08,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 4, 4] total 56 [2022-03-19 08:34:08,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:08,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970288124] [2022-03-19 08:34:08,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970288124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:08,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:08,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-19 08:34:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806567631] [2022-03-19 08:34:08,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:08,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-19 08:34:08,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-19 08:34:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 08:34:08,345 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:09,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:09,230 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2022-03-19 08:34:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 08:34:09,230 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-03-19 08:34:09,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:09,231 INFO L225 Difference]: With dead ends: 120 [2022-03-19 08:34:09,231 INFO L226 Difference]: Without dead ends: 113 [2022-03-19 08:34:09,232 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4231, Invalid=6689, Unknown=0, NotChecked=0, Total=10920 [2022-03-19 08:34:09,233 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:09,233 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 24 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-19 08:34:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-19 08:34:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-03-19 08:34:09,259 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 109 [2022-03-19 08:34:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:09,259 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-03-19 08:34:09,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-03-19 08:34:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 08:34:09,260 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:09,260 INFO L500 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:09,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:09,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-19 08:34:09,476 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:09,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1928210965, now seen corresponding path program 97 times [2022-03-19 08:34:09,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:09,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1167858879] [2022-03-19 08:34:09,685 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:09,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1687008400, now seen corresponding path program 1 times [2022-03-19 08:34:09,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:09,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57002240] [2022-03-19 08:34:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:09,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:09,687 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:09,689 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:09,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1928210965, now seen corresponding path program 98 times [2022-03-19 08:34:09,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:09,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935552036] [2022-03-19 08:34:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:09,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:10,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:10,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935552036] [2022-03-19 08:34:10,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935552036] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110851107] [2022-03-19 08:34:10,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:34:10,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:10,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:10,434 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:10,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 08:34:10,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:34:10,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:10,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 08:34:10,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:10,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:12,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110851107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:12,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:12,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-19 08:34:12,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:12,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1167858879] [2022-03-19 08:34:12,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1167858879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:12,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:12,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-19 08:34:12,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056838821] [2022-03-19 08:34:12,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:12,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 08:34:12,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 08:34:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 08:34:12,164 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:12,881 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-03-19 08:34:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 08:34:12,882 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-03-19 08:34:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:12,882 INFO L225 Difference]: With dead ends: 122 [2022-03-19 08:34:12,882 INFO L226 Difference]: Without dead ends: 115 [2022-03-19 08:34:12,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-19 08:34:12,885 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:12,885 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 54 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:12,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-19 08:34:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-19 08:34:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2022-03-19 08:34:12,889 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2022-03-19 08:34:12,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:12,889 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2022-03-19 08:34:12,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2022-03-19 08:34:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 08:34:12,889 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:12,889 INFO L500 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:12,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:13,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99,SelfDestructingSolverStorable100 [2022-03-19 08:34:13,106 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:13,106 INFO L85 PathProgramCache]: Analyzing trace with hash 32551624, now seen corresponding path program 99 times [2022-03-19 08:34:13,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:13,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [585337283] [2022-03-19 08:34:13,375 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:13,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1746113744, now seen corresponding path program 1 times [2022-03-19 08:34:13,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:13,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831758091] [2022-03-19 08:34:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:13,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:13,378 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:13,380 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:13,380 INFO L85 PathProgramCache]: Analyzing trace with hash 32551624, now seen corresponding path program 100 times [2022-03-19 08:34:13,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:13,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664402000] [2022-03-19 08:34:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:13,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:14,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:14,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:14,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664402000] [2022-03-19 08:34:14,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664402000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:14,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531953636] [2022-03-19 08:34:14,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:34:14,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:14,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:14,214 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:14,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 08:34:14,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:34:14,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 08:34:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:14,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:16,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531953636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:16,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:16,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-03-19 08:34:16,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:16,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [585337283] [2022-03-19 08:34:16,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [585337283] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:16,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:16,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-19 08:34:16,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011507380] [2022-03-19 08:34:16,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:16,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-19 08:34:16,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:16,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-19 08:34:16,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-03-19 08:34:16,431 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:17,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:17,169 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-03-19 08:34:17,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-19 08:34:17,169 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-03-19 08:34:17,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:17,169 INFO L225 Difference]: With dead ends: 124 [2022-03-19 08:34:17,169 INFO L226 Difference]: Without dead ends: 117 [2022-03-19 08:34:17,171 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=10818, Invalid=13674, Unknown=0, NotChecked=0, Total=24492 [2022-03-19 08:34:17,172 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:17,172 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 59 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-19 08:34:17,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-03-19 08:34:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:17,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-03-19 08:34:17,175 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 113 [2022-03-19 08:34:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:17,176 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-03-19 08:34:17,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-03-19 08:34:17,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 08:34:17,176 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:17,176 INFO L500 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:17,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:17,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101,SelfDestructingSolverStorable102 [2022-03-19 08:34:17,393 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:17,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:17,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1165243291, now seen corresponding path program 101 times [2022-03-19 08:34:17,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:17,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [249094538] [2022-03-19 08:34:17,551 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:17,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1805219088, now seen corresponding path program 1 times [2022-03-19 08:34:17,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:17,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510909005] [2022-03-19 08:34:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:17,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:17,555 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:17,556 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1165243291, now seen corresponding path program 102 times [2022-03-19 08:34:17,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:17,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442223364] [2022-03-19 08:34:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:17,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:18,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:18,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442223364] [2022-03-19 08:34:18,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442223364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:18,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763240828] [2022-03-19 08:34:18,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:34:18,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:18,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:18,356 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:18,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 08:34:18,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:34:18,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:18,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:34:18,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 153 proven. 1 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-19 08:34:18,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 153 proven. 1 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-19 08:34:18,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763240828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:18,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:18,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 4, 4] total 59 [2022-03-19 08:34:18,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:18,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [249094538] [2022-03-19 08:34:18,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [249094538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:18,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:18,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-19 08:34:18,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213411511] [2022-03-19 08:34:18,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:18,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 08:34:18,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:18,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 08:34:18,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 08:34:18,654 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:19,415 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2022-03-19 08:34:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 08:34:19,415 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-03-19 08:34:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:19,415 INFO L225 Difference]: With dead ends: 126 [2022-03-19 08:34:19,415 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 08:34:19,416 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4723, Invalid=7487, Unknown=0, NotChecked=0, Total=12210 [2022-03-19 08:34:19,417 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:19,417 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 44 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 08:34:19,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-19 08:34:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:19,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2022-03-19 08:34:19,421 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 115 [2022-03-19 08:34:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:19,421 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2022-03-19 08:34:19,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:19,421 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2022-03-19 08:34:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 08:34:19,421 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:19,421 INFO L500 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:19,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:19,630 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-19 08:34:19,630 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:19,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1194921278, now seen corresponding path program 103 times [2022-03-19 08:34:19,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:19,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [647084284] [2022-03-19 08:34:19,765 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:19,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1864324432, now seen corresponding path program 1 times [2022-03-19 08:34:19,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:19,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688202426] [2022-03-19 08:34:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:19,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:19,768 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:19,774 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1194921278, now seen corresponding path program 104 times [2022-03-19 08:34:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:19,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309453047] [2022-03-19 08:34:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:19,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:20,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:20,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:20,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309453047] [2022-03-19 08:34:20,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309453047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:20,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963911774] [2022-03-19 08:34:20,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:34:20,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:20,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:20,380 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:20,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 08:34:20,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:34:20,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:20,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 08:34:20,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:20,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:22,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963911774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:22,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:22,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-19 08:34:22,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:22,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [647084284] [2022-03-19 08:34:22,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [647084284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:22,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:22,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-19 08:34:22,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815876656] [2022-03-19 08:34:22,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:22,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-19 08:34:22,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-19 08:34:22,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-19 08:34:22,501 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:23,258 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2022-03-19 08:34:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-19 08:34:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-03-19 08:34:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:23,258 INFO L225 Difference]: With dead ends: 128 [2022-03-19 08:34:23,258 INFO L226 Difference]: Without dead ends: 121 [2022-03-19 08:34:23,261 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-19 08:34:23,261 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:23,261 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 24 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-19 08:34:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-19 08:34:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-03-19 08:34:23,265 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2022-03-19 08:34:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:23,265 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-03-19 08:34:23,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-03-19 08:34:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-19 08:34:23,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:23,265 INFO L500 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:23,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-19 08:34:23,478 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105,SelfDestructingSolverStorable106 [2022-03-19 08:34:23,478 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:23,479 INFO L85 PathProgramCache]: Analyzing trace with hash 349304287, now seen corresponding path program 105 times [2022-03-19 08:34:23,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:23,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2031872805] [2022-03-19 08:34:23,685 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:23,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1923429776, now seen corresponding path program 1 times [2022-03-19 08:34:23,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:23,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285372865] [2022-03-19 08:34:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:23,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:23,688 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:23,689 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:23,689 INFO L85 PathProgramCache]: Analyzing trace with hash 349304287, now seen corresponding path program 106 times [2022-03-19 08:34:23,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:23,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772175856] [2022-03-19 08:34:23,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:23,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:24,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:24,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:24,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772175856] [2022-03-19 08:34:24,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772175856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:24,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706394710] [2022-03-19 08:34:24,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:34:24,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:24,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:24,351 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:24,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 08:34:24,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:34:24,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:24,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 08:34:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:24,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:26,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706394710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:26,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:26,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-03-19 08:34:26,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:26,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2031872805] [2022-03-19 08:34:26,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2031872805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:26,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:26,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-19 08:34:26,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224023489] [2022-03-19 08:34:26,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:26,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 08:34:26,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:26,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 08:34:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-03-19 08:34:26,179 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:26,965 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-03-19 08:34:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 08:34:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-03-19 08:34:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:26,966 INFO L225 Difference]: With dead ends: 130 [2022-03-19 08:34:26,966 INFO L226 Difference]: Without dead ends: 123 [2022-03-19 08:34:26,967 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=12102, Invalid=15288, Unknown=0, NotChecked=0, Total=27390 [2022-03-19 08:34:26,967 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:26,967 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 29 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-19 08:34:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-03-19 08:34:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2022-03-19 08:34:26,975 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 119 [2022-03-19 08:34:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:26,975 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2022-03-19 08:34:26,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2022-03-19 08:34:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 08:34:26,975 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:26,975 INFO L500 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:26,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-19 08:34:27,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-19 08:34:27,192 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:27,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1708612164, now seen corresponding path program 107 times [2022-03-19 08:34:27,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:27,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [328049103] [2022-03-19 08:34:27,399 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1982535120, now seen corresponding path program 1 times [2022-03-19 08:34:27,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:27,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606508933] [2022-03-19 08:34:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:27,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:27,402 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:27,404 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1708612164, now seen corresponding path program 108 times [2022-03-19 08:34:27,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:27,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485676192] [2022-03-19 08:34:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:27,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:28,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:28,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:28,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485676192] [2022-03-19 08:34:28,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485676192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:28,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213639850] [2022-03-19 08:34:28,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:34:28,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:28,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:28,396 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:28,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 08:34:28,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:34:28,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:28,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:34:28,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 162 proven. 1 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-03-19 08:34:28,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 162 proven. 1 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2022-03-19 08:34:28,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213639850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:28,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:28,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 4, 4] total 62 [2022-03-19 08:34:28,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:28,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [328049103] [2022-03-19 08:34:28,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [328049103] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:28,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:28,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-19 08:34:28,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910288662] [2022-03-19 08:34:28,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:28,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-19 08:34:28,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:28,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-19 08:34:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 08:34:28,718 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:29,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:29,880 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2022-03-19 08:34:29,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 08:34:29,880 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-03-19 08:34:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:29,881 INFO L225 Difference]: With dead ends: 132 [2022-03-19 08:34:29,881 INFO L226 Difference]: Without dead ends: 125 [2022-03-19 08:34:29,882 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5242, Invalid=8330, Unknown=0, NotChecked=0, Total=13572 [2022-03-19 08:34:29,882 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:29,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 24 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-19 08:34:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-03-19 08:34:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-03-19 08:34:29,886 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 121 [2022-03-19 08:34:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:29,886 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-03-19 08:34:29,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-03-19 08:34:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-19 08:34:29,887 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:29,887 INFO L500 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:29,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-19 08:34:30,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,SelfDestructingSolverStorable109,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:30,100 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash 613601881, now seen corresponding path program 109 times [2022-03-19 08:34:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:30,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1841763003] [2022-03-19 08:34:30,257 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:30,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2041640464, now seen corresponding path program 1 times [2022-03-19 08:34:30,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:30,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109265501] [2022-03-19 08:34:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:30,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:30,260 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:30,261 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash 613601881, now seen corresponding path program 110 times [2022-03-19 08:34:30,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:30,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963253711] [2022-03-19 08:34:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:30,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:30,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:30,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:30,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963253711] [2022-03-19 08:34:30,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963253711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:30,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739136546] [2022-03-19 08:34:30,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:34:30,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:30,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:30,982 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:30,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 08:34:31,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:34:31,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:31,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 08:34:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:31,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:32,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739136546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:32,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:32,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-19 08:34:32,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:32,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1841763003] [2022-03-19 08:34:32,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1841763003] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:32,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:32,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-19 08:34:32,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790320599] [2022-03-19 08:34:32,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:32,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 08:34:32,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:32,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 08:34:32,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-19 08:34:32,939 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:33,875 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2022-03-19 08:34:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 08:34:33,875 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-03-19 08:34:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:33,875 INFO L225 Difference]: With dead ends: 134 [2022-03-19 08:34:33,875 INFO L226 Difference]: Without dead ends: 127 [2022-03-19 08:34:33,876 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-19 08:34:33,877 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:33,877 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 19 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-19 08:34:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-19 08:34:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2022-03-19 08:34:33,881 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 123 [2022-03-19 08:34:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:33,881 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2022-03-19 08:34:33,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2022-03-19 08:34:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-19 08:34:33,882 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:33,882 INFO L500 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:33,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:34,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,SelfDestructingSolverStorable112,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:34,098 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:34,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1121694794, now seen corresponding path program 111 times [2022-03-19 08:34:34,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:34,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1071370943] [2022-03-19 08:34:34,253 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:34,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2100745808, now seen corresponding path program 1 times [2022-03-19 08:34:34,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:34,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924292499] [2022-03-19 08:34:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:34,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:34,255 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:34,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:34,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1121694794, now seen corresponding path program 112 times [2022-03-19 08:34:34,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:34,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232128429] [2022-03-19 08:34:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:34,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:34,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:34,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:34,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232128429] [2022-03-19 08:34:34,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232128429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:34,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330125435] [2022-03-19 08:34:34,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:34:34,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:34,921 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:34,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 08:34:34,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:34:34,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:34,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 08:34:34,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:35,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:36,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330125435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:36,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:36,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-03-19 08:34:36,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:36,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1071370943] [2022-03-19 08:34:36,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1071370943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:36,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:36,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-19 08:34:36,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527586524] [2022-03-19 08:34:36,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:36,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-19 08:34:36,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:36,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-19 08:34:36,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 08:34:36,990 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:37,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:37,852 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2022-03-19 08:34:37,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-19 08:34:37,852 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-03-19 08:34:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:37,852 INFO L225 Difference]: With dead ends: 136 [2022-03-19 08:34:37,852 INFO L226 Difference]: Without dead ends: 129 [2022-03-19 08:34:37,855 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=13458, Invalid=16992, Unknown=0, NotChecked=0, Total=30450 [2022-03-19 08:34:37,855 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:37,855 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 34 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-19 08:34:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-19 08:34:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-03-19 08:34:37,860 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 125 [2022-03-19 08:34:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:37,860 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-03-19 08:34:37,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-03-19 08:34:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 08:34:37,860 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:37,860 INFO L500 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:37,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:38,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113,SelfDestructingSolverStorable114 [2022-03-19 08:34:38,077 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:38,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:38,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2000478675, now seen corresponding path program 113 times [2022-03-19 08:34:38,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:38,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [492093453] [2022-03-19 08:34:38,187 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:38,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2135116144, now seen corresponding path program 1 times [2022-03-19 08:34:38,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:38,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379121948] [2022-03-19 08:34:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:38,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:38,189 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:38,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2000478675, now seen corresponding path program 114 times [2022-03-19 08:34:38,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:38,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284181510] [2022-03-19 08:34:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:38,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:38,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:38,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:38,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284181510] [2022-03-19 08:34:38,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284181510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:38,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931876550] [2022-03-19 08:34:38,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:34:38,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:38,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:38,981 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:38,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 08:34:39,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:34:39,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:34:39,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 171 proven. 1 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2022-03-19 08:34:39,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 171 proven. 1 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2022-03-19 08:34:39,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931876550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:39,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:39,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 4, 4] total 65 [2022-03-19 08:34:39,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:39,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [492093453] [2022-03-19 08:34:39,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [492093453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:39,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:39,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-19 08:34:39,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789249377] [2022-03-19 08:34:39,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:39,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-19 08:34:39,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-19 08:34:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 08:34:39,305 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:40,471 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2022-03-19 08:34:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-19 08:34:40,471 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-03-19 08:34:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:40,471 INFO L225 Difference]: With dead ends: 138 [2022-03-19 08:34:40,471 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 08:34:40,472 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5788, Invalid=9218, Unknown=0, NotChecked=0, Total=15006 [2022-03-19 08:34:40,472 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:40,473 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 08:34:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-19 08:34:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2022-03-19 08:34:40,477 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2022-03-19 08:34:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:40,477 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2022-03-19 08:34:40,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2022-03-19 08:34:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 08:34:40,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:40,477 INFO L500 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:40,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-19 08:34:40,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115,SelfDestructingSolverStorable116 [2022-03-19 08:34:40,684 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:40,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:40,685 INFO L85 PathProgramCache]: Analyzing trace with hash 227042480, now seen corresponding path program 115 times [2022-03-19 08:34:40,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:40,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1960742980] [2022-03-19 08:34:40,898 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2076010800, now seen corresponding path program 1 times [2022-03-19 08:34:40,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:40,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310988726] [2022-03-19 08:34:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:40,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:40,901 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:40,903 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:40,903 INFO L85 PathProgramCache]: Analyzing trace with hash 227042480, now seen corresponding path program 116 times [2022-03-19 08:34:40,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:40,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329333477] [2022-03-19 08:34:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:40,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:41,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:41,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:41,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329333477] [2022-03-19 08:34:41,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329333477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:41,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592060359] [2022-03-19 08:34:41,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:34:41,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:41,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:41,802 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:41,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 08:34:41,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:34:41,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 08:34:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:42,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:44,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592060359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:44,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:44,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-19 08:34:44,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:44,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1960742980] [2022-03-19 08:34:44,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1960742980] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:44,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:44,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-19 08:34:44,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292184884] [2022-03-19 08:34:44,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:44,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-19 08:34:44,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-19 08:34:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-19 08:34:44,043 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:44,971 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-03-19 08:34:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-19 08:34:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-03-19 08:34:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:44,972 INFO L225 Difference]: With dead ends: 140 [2022-03-19 08:34:44,972 INFO L226 Difference]: Without dead ends: 133 [2022-03-19 08:34:44,974 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-19 08:34:44,975 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:44,975 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 39 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-19 08:34:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-19 08:34:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2022-03-19 08:34:44,979 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 129 [2022-03-19 08:34:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:44,979 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2022-03-19 08:34:44,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:44,979 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2022-03-19 08:34:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 08:34:44,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:44,980 INFO L500 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:44,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:45,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117,SelfDestructingSolverStorable118 [2022-03-19 08:34:45,193 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1056875597, now seen corresponding path program 117 times [2022-03-19 08:34:45,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:45,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015395185] [2022-03-19 08:34:45,433 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:45,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2016905456, now seen corresponding path program 1 times [2022-03-19 08:34:45,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:45,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964810678] [2022-03-19 08:34:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:45,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:45,436 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:45,438 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:45,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1056875597, now seen corresponding path program 118 times [2022-03-19 08:34:45,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:45,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566082400] [2022-03-19 08:34:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:45,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:46,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:46,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:46,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566082400] [2022-03-19 08:34:46,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566082400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:46,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596347045] [2022-03-19 08:34:46,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:34:46,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:46,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:46,521 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:46,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 08:34:46,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:34:46,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:46,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 08:34:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:46,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:49,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596347045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:49,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:49,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-03-19 08:34:49,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:49,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015395185] [2022-03-19 08:34:49,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015395185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:49,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:49,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-19 08:34:49,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818948802] [2022-03-19 08:34:49,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:49,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-19 08:34:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:49,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-19 08:34:49,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-03-19 08:34:49,620 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:50,579 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-03-19 08:34:50,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 08:34:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-03-19 08:34:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:50,581 INFO L225 Difference]: With dead ends: 142 [2022-03-19 08:34:50,581 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 08:34:50,584 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=14886, Invalid=18786, Unknown=0, NotChecked=0, Total=33672 [2022-03-19 08:34:50,588 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:50,588 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 39 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 08:34:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-03-19 08:34:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2022-03-19 08:34:50,593 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 131 [2022-03-19 08:34:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:50,593 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2022-03-19 08:34:50,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2022-03-19 08:34:50,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 08:34:50,593 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:50,593 INFO L500 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:50,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:50,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-19 08:34:50,799 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash -337416022, now seen corresponding path program 119 times [2022-03-19 08:34:50,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:50,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [177222445] [2022-03-19 08:34:50,980 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:50,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1957800112, now seen corresponding path program 1 times [2022-03-19 08:34:50,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:50,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004822209] [2022-03-19 08:34:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:50,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:50,983 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:50,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:50,985 INFO L85 PathProgramCache]: Analyzing trace with hash -337416022, now seen corresponding path program 120 times [2022-03-19 08:34:50,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:50,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298416522] [2022-03-19 08:34:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:50,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:51,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:51,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298416522] [2022-03-19 08:34:51,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298416522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441269179] [2022-03-19 08:34:51,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:34:51,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:51,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:51,976 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:51,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 08:34:52,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:34:52,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:52,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:34:52,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-03-19 08:34:52,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-03-19 08:34:52,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441269179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:52,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:52,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 4, 4] total 68 [2022-03-19 08:34:52,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:52,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [177222445] [2022-03-19 08:34:52,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [177222445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:52,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:52,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-19 08:34:52,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926430392] [2022-03-19 08:34:52,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:52,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-19 08:34:52,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:52,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-19 08:34:52,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-19 08:34:52,239 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:53,197 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2022-03-19 08:34:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-19 08:34:53,198 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-03-19 08:34:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:53,200 INFO L225 Difference]: With dead ends: 144 [2022-03-19 08:34:53,200 INFO L226 Difference]: Without dead ends: 137 [2022-03-19 08:34:53,201 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=6361, Invalid=10151, Unknown=0, NotChecked=0, Total=16512 [2022-03-19 08:34:53,202 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:53,203 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 39 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-19 08:34:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-19 08:34:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2022-03-19 08:34:53,210 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 133 [2022-03-19 08:34:53,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:53,211 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2022-03-19 08:34:53,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2022-03-19 08:34:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 08:34:53,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:53,211 INFO L500 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:53,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:53,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,SelfDestructingSolverStorable122,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:53,427 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:53,427 INFO L85 PathProgramCache]: Analyzing trace with hash -221865529, now seen corresponding path program 121 times [2022-03-19 08:34:53,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:53,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1597030341] [2022-03-19 08:34:53,603 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:53,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1898694768, now seen corresponding path program 1 times [2022-03-19 08:34:53,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:53,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734399077] [2022-03-19 08:34:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:53,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:53,617 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:53,631 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash -221865529, now seen corresponding path program 122 times [2022-03-19 08:34:53,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233479040] [2022-03-19 08:34:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:53,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:54,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:54,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:54,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233479040] [2022-03-19 08:34:54,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233479040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:54,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112489711] [2022-03-19 08:34:54,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:34:54,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:54,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:54,418 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:54,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 08:34:54,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:34:54,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:54,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 08:34:54,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:54,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:34:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:57,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112489711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:34:57,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:34:57,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-19 08:34:57,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:34:57,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1597030341] [2022-03-19 08:34:57,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1597030341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:34:57,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:34:57,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-19 08:34:57,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276722187] [2022-03-19 08:34:57,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:34:57,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-19 08:34:57,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:57,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-19 08:34:57,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-19 08:34:57,297 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:34:58,281 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2022-03-19 08:34:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 08:34:58,281 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-03-19 08:34:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:34:58,282 INFO L225 Difference]: With dead ends: 146 [2022-03-19 08:34:58,282 INFO L226 Difference]: Without dead ends: 139 [2022-03-19 08:34:58,284 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-19 08:34:58,284 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:34:58,284 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 49 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:34:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-19 08:34:58,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-19 08:34:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2022-03-19 08:34:58,289 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 135 [2022-03-19 08:34:58,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:34:58,289 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2022-03-19 08:34:58,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:34:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2022-03-19 08:34:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 08:34:58,290 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:34:58,290 INFO L500 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:34:58,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-19 08:34:58,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123,SelfDestructingSolverStorable124 [2022-03-19 08:34:58,503 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:34:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:34:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash -846991452, now seen corresponding path program 123 times [2022-03-19 08:34:58,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:34:58,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134725259] [2022-03-19 08:34:58,649 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:34:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1839589424, now seen corresponding path program 1 times [2022-03-19 08:34:58,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:58,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280636538] [2022-03-19 08:34:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:58,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:58,651 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:34:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:34:58,653 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:34:58,653 INFO L85 PathProgramCache]: Analyzing trace with hash -846991452, now seen corresponding path program 124 times [2022-03-19 08:34:58,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:34:58,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748845340] [2022-03-19 08:34:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:34:58,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:34:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:59,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:34:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:34:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:59,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:34:59,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748845340] [2022-03-19 08:34:59,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748845340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:34:59,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330803325] [2022-03-19 08:34:59,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:34:59,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:34:59,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:34:59,407 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:34:59,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 08:34:59,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:34:59,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:34:59,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 08:34:59,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:34:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:34:59,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:02,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330803325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:02,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:02,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-03-19 08:35:02,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:02,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134725259] [2022-03-19 08:35:02,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134725259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:02,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:02,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-19 08:35:02,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562773926] [2022-03-19 08:35:02,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:02,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-19 08:35:02,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:02,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-19 08:35:02,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-03-19 08:35:02,229 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:03,234 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-03-19 08:35:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-19 08:35:03,235 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-03-19 08:35:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:03,235 INFO L225 Difference]: With dead ends: 148 [2022-03-19 08:35:03,235 INFO L226 Difference]: Without dead ends: 141 [2022-03-19 08:35:03,238 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=16386, Invalid=20670, Unknown=0, NotChecked=0, Total=37056 [2022-03-19 08:35:03,238 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:03,238 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 39 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-19 08:35:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-03-19 08:35:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2022-03-19 08:35:03,243 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2022-03-19 08:35:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:03,243 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2022-03-19 08:35:03,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2022-03-19 08:35:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-19 08:35:03,243 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:03,243 INFO L500 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:03,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-19 08:35:03,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126,SelfDestructingSolverStorable125 [2022-03-19 08:35:03,459 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:03,460 INFO L85 PathProgramCache]: Analyzing trace with hash -297582015, now seen corresponding path program 125 times [2022-03-19 08:35:03,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:03,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907308298] [2022-03-19 08:35:03,609 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:03,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1780484080, now seen corresponding path program 1 times [2022-03-19 08:35:03,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:03,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569304667] [2022-03-19 08:35:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:03,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:03,613 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:03,616 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:03,616 INFO L85 PathProgramCache]: Analyzing trace with hash -297582015, now seen corresponding path program 126 times [2022-03-19 08:35:03,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:03,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019929418] [2022-03-19 08:35:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:03,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:04,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:35:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:04,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:35:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019929418] [2022-03-19 08:35:04,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019929418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:35:04,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187313729] [2022-03-19 08:35:04,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:35:04,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:04,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:35:04,431 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:35:04,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 08:35:04,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:35:04,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:35:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:35:04,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:35:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 189 proven. 1 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-03-19 08:35:04,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 189 proven. 1 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-03-19 08:35:04,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187313729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:04,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:04,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 4, 4] total 71 [2022-03-19 08:35:04,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:04,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907308298] [2022-03-19 08:35:04,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907308298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:04,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:04,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-19 08:35:04,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698456718] [2022-03-19 08:35:04,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:04,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-19 08:35:04,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:04,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-19 08:35:04,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 08:35:04,694 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:06,124 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2022-03-19 08:35:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 08:35:06,125 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-03-19 08:35:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:06,125 INFO L225 Difference]: With dead ends: 150 [2022-03-19 08:35:06,125 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 08:35:06,126 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6961, Invalid=11129, Unknown=0, NotChecked=0, Total=18090 [2022-03-19 08:35:06,127 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:06,127 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 39 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 08:35:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-03-19 08:35:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2022-03-19 08:35:06,131 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 139 [2022-03-19 08:35:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:06,131 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2022-03-19 08:35:06,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:06,131 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2022-03-19 08:35:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 08:35:06,132 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:06,132 INFO L500 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:06,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-19 08:35:06,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127,SelfDestructingSolverStorable128 [2022-03-19 08:35:06,348 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:06,348 INFO L85 PathProgramCache]: Analyzing trace with hash -596090466, now seen corresponding path program 127 times [2022-03-19 08:35:06,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:06,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1882829044] [2022-03-19 08:35:06,557 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1721378736, now seen corresponding path program 1 times [2022-03-19 08:35:06,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:06,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642503545] [2022-03-19 08:35:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:06,559 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:06,561 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:06,561 INFO L85 PathProgramCache]: Analyzing trace with hash -596090466, now seen corresponding path program 128 times [2022-03-19 08:35:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:06,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887301599] [2022-03-19 08:35:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:06,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:07,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:35:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:07,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:35:07,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887301599] [2022-03-19 08:35:07,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887301599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:35:07,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83697507] [2022-03-19 08:35:07,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:35:07,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:07,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:35:07,699 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:35:07,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 08:35:07,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:35:07,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:35:07,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-19 08:35:07,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:35:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:07,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:10,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83697507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:10,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:10,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-19 08:35:10,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:10,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1882829044] [2022-03-19 08:35:10,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1882829044] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:10,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:10,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-19 08:35:10,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765620996] [2022-03-19 08:35:10,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:10,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-19 08:35:10,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:10,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-19 08:35:10,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-19 08:35:10,266 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:11,369 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2022-03-19 08:35:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-19 08:35:11,369 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-03-19 08:35:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:11,370 INFO L225 Difference]: With dead ends: 152 [2022-03-19 08:35:11,370 INFO L226 Difference]: Without dead ends: 145 [2022-03-19 08:35:11,373 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-19 08:35:11,373 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:11,373 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 44 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-19 08:35:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-19 08:35:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-03-19 08:35:11,378 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 141 [2022-03-19 08:35:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:11,378 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-03-19 08:35:11,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-03-19 08:35:11,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 08:35:11,379 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:11,379 INFO L500 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:11,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-19 08:35:11,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,SelfDestructingSolverStorable129,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:11,594 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash 300096955, now seen corresponding path program 129 times [2022-03-19 08:35:11,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:11,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2003362409] [2022-03-19 08:35:11,779 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1662273392, now seen corresponding path program 1 times [2022-03-19 08:35:11,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:11,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794385458] [2022-03-19 08:35:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:11,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:11,782 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:11,784 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash 300096955, now seen corresponding path program 130 times [2022-03-19 08:35:11,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:11,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570768385] [2022-03-19 08:35:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:11,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:12,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:35:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:12,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:35:12,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570768385] [2022-03-19 08:35:12,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570768385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:35:12,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422103905] [2022-03-19 08:35:12,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:35:12,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:12,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:35:12,815 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:35:12,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-19 08:35:12,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:35:12,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:35:12,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 08:35:12,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:35:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:13,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:16,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422103905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:16,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:16,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-03-19 08:35:16,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:16,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2003362409] [2022-03-19 08:35:16,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2003362409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:16,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:16,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-19 08:35:16,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874128630] [2022-03-19 08:35:16,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:16,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-19 08:35:16,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-19 08:35:16,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-03-19 08:35:16,343 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:18,009 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2022-03-19 08:35:18,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 08:35:18,009 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-19 08:35:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:18,009 INFO L225 Difference]: With dead ends: 154 [2022-03-19 08:35:18,009 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 08:35:18,011 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=17958, Invalid=22644, Unknown=0, NotChecked=0, Total=40602 [2022-03-19 08:35:18,011 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:18,011 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 49 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:18,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 08:35:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-19 08:35:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2022-03-19 08:35:18,026 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 143 [2022-03-19 08:35:18,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:18,027 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2022-03-19 08:35:18,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2022-03-19 08:35:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-19 08:35:18,027 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:18,027 INFO L500 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:18,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-19 08:35:18,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131,SelfDestructingSolverStorable132 [2022-03-19 08:35:18,237 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:18,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1752217960, now seen corresponding path program 131 times [2022-03-19 08:35:18,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:18,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [661795737] [2022-03-19 08:35:18,434 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:18,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1603168048, now seen corresponding path program 1 times [2022-03-19 08:35:18,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:18,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132024799] [2022-03-19 08:35:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:18,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:18,437 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:18,438 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1752217960, now seen corresponding path program 132 times [2022-03-19 08:35:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:18,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516420927] [2022-03-19 08:35:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:18,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:19,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:35:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:19,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:35:19,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516420927] [2022-03-19 08:35:19,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516420927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:35:19,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355197160] [2022-03-19 08:35:19,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:35:19,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:19,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:35:19,388 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:35:19,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-19 08:35:19,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:35:19,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:35:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:35:19,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:35:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-19 08:35:19,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 198 proven. 1 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-03-19 08:35:19,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355197160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:19,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:19,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 4, 4] total 74 [2022-03-19 08:35:19,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:19,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [661795737] [2022-03-19 08:35:19,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [661795737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:19,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:19,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-19 08:35:19,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666171209] [2022-03-19 08:35:19,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:19,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-19 08:35:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:19,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-19 08:35:19,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 08:35:19,680 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:20,858 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2022-03-19 08:35:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-19 08:35:20,859 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-03-19 08:35:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:20,859 INFO L225 Difference]: With dead ends: 156 [2022-03-19 08:35:20,859 INFO L226 Difference]: Without dead ends: 149 [2022-03-19 08:35:20,860 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=7588, Invalid=12152, Unknown=0, NotChecked=0, Total=19740 [2022-03-19 08:35:20,860 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:20,860 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 59 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-19 08:35:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-03-19 08:35:20,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2022-03-19 08:35:20,865 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 145 [2022-03-19 08:35:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:20,865 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2022-03-19 08:35:20,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2022-03-19 08:35:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-19 08:35:20,865 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:20,865 INFO L500 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:20,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-19 08:35:21,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133,SelfDestructingSolverStorable134 [2022-03-19 08:35:21,082 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:21,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:21,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1658104885, now seen corresponding path program 133 times [2022-03-19 08:35:21,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:21,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [929192919] [2022-03-19 08:35:21,210 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1544062704, now seen corresponding path program 1 times [2022-03-19 08:35:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:21,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228083862] [2022-03-19 08:35:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:21,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:21,212 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:21,214 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:21,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1658104885, now seen corresponding path program 134 times [2022-03-19 08:35:21,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:21,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805562234] [2022-03-19 08:35:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:21,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:22,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:35:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:22,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:35:22,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805562234] [2022-03-19 08:35:22,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805562234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:35:22,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740027211] [2022-03-19 08:35:22,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:35:22,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:22,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:35:22,236 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:35:22,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-19 08:35:22,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:35:22,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:35:22,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 08:35:22,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:35:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:22,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:25,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740027211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:25,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:25,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-19 08:35:25,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:25,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [929192919] [2022-03-19 08:35:25,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [929192919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:25,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:25,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-19 08:35:25,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490505597] [2022-03-19 08:35:25,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:25,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-19 08:35:25,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:25,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-19 08:35:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 08:35:25,240 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:26,591 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2022-03-19 08:35:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 08:35:26,591 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-03-19 08:35:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:26,592 INFO L225 Difference]: With dead ends: 158 [2022-03-19 08:35:26,592 INFO L226 Difference]: Without dead ends: 151 [2022-03-19 08:35:26,594 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-03-19 08:35:26,594 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:26,595 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 54 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:26,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-19 08:35:26,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-19 08:35:26,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2022-03-19 08:35:26,616 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2022-03-19 08:35:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:26,616 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2022-03-19 08:35:26,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2022-03-19 08:35:26,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 08:35:26,617 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:26,617 INFO L500 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:26,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-19 08:35:26,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135,SelfDestructingSolverStorable136 [2022-03-19 08:35:26,817 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:26,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:26,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1918312082, now seen corresponding path program 135 times [2022-03-19 08:35:26,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:26,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [958561291] [2022-03-19 08:35:26,953 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:26,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1484957360, now seen corresponding path program 1 times [2022-03-19 08:35:26,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:26,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575296428] [2022-03-19 08:35:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:26,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:26,956 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:26,959 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:26,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1918312082, now seen corresponding path program 136 times [2022-03-19 08:35:26,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:26,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341797102] [2022-03-19 08:35:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:26,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:28,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:35:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:35:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341797102] [2022-03-19 08:35:28,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341797102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:35:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387550953] [2022-03-19 08:35:28,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:35:28,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:28,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:35:28,116 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:35:28,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-19 08:35:28,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:35:28,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:35:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-19 08:35:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:35:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:28,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:30,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387550953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:30,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:30,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-03-19 08:35:30,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:30,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [958561291] [2022-03-19 08:35:30,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [958561291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:30,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:30,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-19 08:35:30,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972865278] [2022-03-19 08:35:30,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:30,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-19 08:35:30,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:30,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-19 08:35:30,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-03-19 08:35:30,934 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:32,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:32,182 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-03-19 08:35:32,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-19 08:35:32,182 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-03-19 08:35:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:32,183 INFO L225 Difference]: With dead ends: 160 [2022-03-19 08:35:32,183 INFO L226 Difference]: Without dead ends: 153 [2022-03-19 08:35:32,185 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=19602, Invalid=24708, Unknown=0, NotChecked=0, Total=44310 [2022-03-19 08:35:32,185 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:32,185 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 49 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-19 08:35:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-19 08:35:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2022-03-19 08:35:32,190 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 149 [2022-03-19 08:35:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:32,190 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2022-03-19 08:35:32,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2022-03-19 08:35:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 08:35:32,191 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:32,191 INFO L500 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:32,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-19 08:35:32,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137,SelfDestructingSolverStorable138 [2022-03-19 08:35:32,408 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:32,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1425642065, now seen corresponding path program 137 times [2022-03-19 08:35:32,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:32,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1083873305] [2022-03-19 08:35:32,562 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:32,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1425852016, now seen corresponding path program 1 times [2022-03-19 08:35:32,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:32,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871591378] [2022-03-19 08:35:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:32,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:32,564 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:32,566 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:32,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1425642065, now seen corresponding path program 138 times [2022-03-19 08:35:32,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:32,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694901860] [2022-03-19 08:35:32,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:32,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:33,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:35:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:33,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:35:33,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694901860] [2022-03-19 08:35:33,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694901860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:35:33,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836499207] [2022-03-19 08:35:33,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:35:33,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:33,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:35:33,526 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:35:33,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-19 08:35:33,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:35:33,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:35:33,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:35:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:35:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 207 proven. 1 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2022-03-19 08:35:33,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 207 proven. 1 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2022-03-19 08:35:34,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836499207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:34,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:34,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 4, 4] total 77 [2022-03-19 08:35:34,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:34,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1083873305] [2022-03-19 08:35:34,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1083873305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:34,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:34,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-19 08:35:34,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88486670] [2022-03-19 08:35:34,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:34,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-19 08:35:34,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:34,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-19 08:35:34,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-03-19 08:35:34,035 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:35,362 INFO L93 Difference]: Finished difference Result 162 states and 166 transitions. [2022-03-19 08:35:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 08:35:35,362 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-03-19 08:35:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:35,363 INFO L225 Difference]: With dead ends: 162 [2022-03-19 08:35:35,363 INFO L226 Difference]: Without dead ends: 155 [2022-03-19 08:35:35,364 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8242, Invalid=13220, Unknown=0, NotChecked=0, Total=21462 [2022-03-19 08:35:35,365 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:35,365 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 29 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:35,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-19 08:35:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-19 08:35:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2022-03-19 08:35:35,369 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 151 [2022-03-19 08:35:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:35,369 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2022-03-19 08:35:35,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2022-03-19 08:35:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 08:35:35,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:35,370 INFO L500 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:35,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-19 08:35:35,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,SelfDestructingSolverStorable139,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:35,575 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1964927372, now seen corresponding path program 139 times [2022-03-19 08:35:35,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:35,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1493858756] [2022-03-19 08:35:35,782 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1366746672, now seen corresponding path program 1 times [2022-03-19 08:35:35,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:35,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766939696] [2022-03-19 08:35:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:35,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:35,784 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:35,786 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:35,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1964927372, now seen corresponding path program 140 times [2022-03-19 08:35:35,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:35,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084574876] [2022-03-19 08:35:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:35,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:37,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:35:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:37,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:35:37,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084574876] [2022-03-19 08:35:37,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084574876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:35:37,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98762332] [2022-03-19 08:35:37,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:35:37,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:37,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:35:37,124 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:35:37,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-19 08:35:37,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:35:37,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:35:37,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-19 08:35:37,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:35:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:37,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:41,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98762332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:41,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:41,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-19 08:35:41,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:41,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1493858756] [2022-03-19 08:35:41,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1493858756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:41,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:41,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-19 08:35:41,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351279667] [2022-03-19 08:35:41,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:41,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-19 08:35:41,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:41,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-19 08:35:41,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-03-19 08:35:41,426 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:42,755 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2022-03-19 08:35:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-19 08:35:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-03-19 08:35:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:42,756 INFO L225 Difference]: With dead ends: 164 [2022-03-19 08:35:42,756 INFO L226 Difference]: Without dead ends: 157 [2022-03-19 08:35:42,758 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-03-19 08:35:42,758 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:42,758 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 24 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-19 08:35:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-03-19 08:35:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-03-19 08:35:42,763 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 153 [2022-03-19 08:35:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:42,763 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-03-19 08:35:42,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:42,763 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-03-19 08:35:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 08:35:42,763 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:42,763 INFO L500 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:42,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-19 08:35:42,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,SelfDestructingSolverStorable142,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:42,964 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash 421978665, now seen corresponding path program 141 times [2022-03-19 08:35:42,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:42,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [490124103] [2022-03-19 08:35:43,179 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:43,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1307641328, now seen corresponding path program 1 times [2022-03-19 08:35:43,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:43,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706494758] [2022-03-19 08:35:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:43,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:43,181 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:43,183 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:43,183 INFO L85 PathProgramCache]: Analyzing trace with hash 421978665, now seen corresponding path program 142 times [2022-03-19 08:35:43,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:43,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643626933] [2022-03-19 08:35:43,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:43,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:44,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:35:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:44,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:35:44,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643626933] [2022-03-19 08:35:44,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643626933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:35:44,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579407566] [2022-03-19 08:35:44,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:35:44,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:44,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:35:44,416 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:35:44,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-19 08:35:44,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:35:44,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:35:44,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-19 08:35:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:35:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:44,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:47,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579407566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:47,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:47,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-03-19 08:35:47,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:47,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [490124103] [2022-03-19 08:35:47,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [490124103] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:47,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:47,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-19 08:35:47,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940370402] [2022-03-19 08:35:47,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:47,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-19 08:35:47,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:47,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-19 08:35:47,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-03-19 08:35:47,877 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:49,239 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-03-19 08:35:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 08:35:49,240 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-19 08:35:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:49,240 INFO L225 Difference]: With dead ends: 166 [2022-03-19 08:35:49,240 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 08:35:49,242 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=21318, Invalid=26862, Unknown=0, NotChecked=0, Total=48180 [2022-03-19 08:35:49,243 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:49,243 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 54 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 08:35:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-03-19 08:35:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2022-03-19 08:35:49,261 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 155 [2022-03-19 08:35:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:49,262 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2022-03-19 08:35:49,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:49,262 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2022-03-19 08:35:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-19 08:35:49,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:49,262 INFO L500 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:49,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-19 08:35:49,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-19 08:35:49,463 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:49,463 INFO L85 PathProgramCache]: Analyzing trace with hash -588011642, now seen corresponding path program 143 times [2022-03-19 08:35:49,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:49,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1547668230] [2022-03-19 08:35:49,615 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1248535984, now seen corresponding path program 1 times [2022-03-19 08:35:49,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:49,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823084720] [2022-03-19 08:35:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:49,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:49,618 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:49,619 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:49,619 INFO L85 PathProgramCache]: Analyzing trace with hash -588011642, now seen corresponding path program 144 times [2022-03-19 08:35:49,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:49,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694983614] [2022-03-19 08:35:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:49,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:50,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:35:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:50,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:35:50,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694983614] [2022-03-19 08:35:50,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694983614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:35:50,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341048775] [2022-03-19 08:35:50,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:35:50,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:50,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:35:50,651 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:35:50,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-19 08:35:50,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:35:50,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:35:50,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:35:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:35:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2022-03-19 08:35:50,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 216 proven. 1 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2022-03-19 08:35:51,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341048775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:51,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:51,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 4, 4] total 80 [2022-03-19 08:35:51,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:51,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1547668230] [2022-03-19 08:35:51,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1547668230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:51,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:51,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-19 08:35:51,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667286082] [2022-03-19 08:35:51,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:51,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-19 08:35:51,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-19 08:35:51,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 08:35:51,175 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:52,639 INFO L93 Difference]: Finished difference Result 168 states and 172 transitions. [2022-03-19 08:35:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-19 08:35:52,639 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-03-19 08:35:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:52,640 INFO L225 Difference]: With dead ends: 168 [2022-03-19 08:35:52,640 INFO L226 Difference]: Without dead ends: 161 [2022-03-19 08:35:52,642 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8923, Invalid=14333, Unknown=0, NotChecked=0, Total=23256 [2022-03-19 08:35:52,642 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:52,642 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 44 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-19 08:35:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-03-19 08:35:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2022-03-19 08:35:52,647 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2022-03-19 08:35:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:52,647 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2022-03-19 08:35:52,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:52,647 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2022-03-19 08:35:52,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-19 08:35:52,648 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:52,648 INFO L500 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:52,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-19 08:35:52,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145,SelfDestructingSolverStorable146 [2022-03-19 08:35:52,864 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash -526087773, now seen corresponding path program 145 times [2022-03-19 08:35:52,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1406994178] [2022-03-19 08:35:52,974 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:52,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1189430640, now seen corresponding path program 1 times [2022-03-19 08:35:52,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:52,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751259225] [2022-03-19 08:35:52,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:52,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:52,977 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:52,978 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:52,978 INFO L85 PathProgramCache]: Analyzing trace with hash -526087773, now seen corresponding path program 146 times [2022-03-19 08:35:52,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:52,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285952862] [2022-03-19 08:35:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:52,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:54,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:35:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:35:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:54,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:35:54,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285952862] [2022-03-19 08:35:54,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285952862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:35:54,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360456439] [2022-03-19 08:35:54,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:35:54,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:35:54,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:35:54,011 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:35:54,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-19 08:35:54,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:35:54,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:35:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 08:35:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:35:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:54,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:35:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:35:57,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360456439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:35:57,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:35:57,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-19 08:35:57,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:35:57,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1406994178] [2022-03-19 08:35:57,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1406994178] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:35:57,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:35:57,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-19 08:35:57,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897433742] [2022-03-19 08:35:57,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:35:57,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-19 08:35:57,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-19 08:35:57,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-03-19 08:35:57,560 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:35:58,989 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2022-03-19 08:35:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-19 08:35:58,989 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-03-19 08:35:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:35:58,989 INFO L225 Difference]: With dead ends: 170 [2022-03-19 08:35:58,989 INFO L226 Difference]: Without dead ends: 163 [2022-03-19 08:35:58,992 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-03-19 08:35:58,993 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:35:58,993 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 44 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:35:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-19 08:35:58,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-03-19 08:35:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2022-03-19 08:35:58,998 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 159 [2022-03-19 08:35:58,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:35:58,998 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2022-03-19 08:35:58,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:35:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2022-03-19 08:35:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-19 08:35:58,998 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:35:58,998 INFO L500 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:35:59,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-19 08:35:59,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-19 08:35:59,211 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:35:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:35:59,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1146791808, now seen corresponding path program 147 times [2022-03-19 08:35:59,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:35:59,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900164508] [2022-03-19 08:35:59,384 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:35:59,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1130325296, now seen corresponding path program 1 times [2022-03-19 08:35:59,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:59,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973686922] [2022-03-19 08:35:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:59,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:59,390 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:35:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:35:59,392 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:35:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1146791808, now seen corresponding path program 148 times [2022-03-19 08:35:59,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:35:59,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870946498] [2022-03-19 08:35:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:35:59,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:35:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:00,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:36:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:00,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:36:00,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870946498] [2022-03-19 08:36:00,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870946498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:36:00,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108573468] [2022-03-19 08:36:00,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:36:00,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:00,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:36:00,441 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:36:00,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-19 08:36:00,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:36:00,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:36:00,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-19 08:36:00,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:36:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:00,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:36:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:03,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108573468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:36:03,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:36:03,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-03-19 08:36:03,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:36:03,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900164508] [2022-03-19 08:36:03,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900164508] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:36:03,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:36:03,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-19 08:36:03,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594790792] [2022-03-19 08:36:03,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:36:03,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-19 08:36:03,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:03,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-19 08:36:03,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-03-19 08:36:03,692 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:36:05,136 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-03-19 08:36:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-19 08:36:05,136 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-03-19 08:36:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:36:05,136 INFO L225 Difference]: With dead ends: 172 [2022-03-19 08:36:05,136 INFO L226 Difference]: Without dead ends: 165 [2022-03-19 08:36:05,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=23106, Invalid=29106, Unknown=0, NotChecked=0, Total=52212 [2022-03-19 08:36:05,139 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:36:05,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 29 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:36:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-19 08:36:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-03-19 08:36:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2022-03-19 08:36:05,144 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 161 [2022-03-19 08:36:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:36:05,144 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2022-03-19 08:36:05,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2022-03-19 08:36:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 08:36:05,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:36:05,145 INFO L500 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:36:05,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-19 08:36:05,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,SelfDestructingSolverStorable149,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:05,361 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:36:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:36:05,362 INFO L85 PathProgramCache]: Analyzing trace with hash -642915299, now seen corresponding path program 149 times [2022-03-19 08:36:05,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:05,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [938038996] [2022-03-19 08:36:05,563 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:36:05,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1071219952, now seen corresponding path program 1 times [2022-03-19 08:36:05,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:05,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034302071] [2022-03-19 08:36:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:05,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:05,565 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:36:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:05,567 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:36:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash -642915299, now seen corresponding path program 150 times [2022-03-19 08:36:05,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:05,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137451426] [2022-03-19 08:36:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:05,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:07,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:36:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:07,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:36:07,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137451426] [2022-03-19 08:36:07,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137451426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:36:07,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359973364] [2022-03-19 08:36:07,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:36:07,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:07,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:36:07,363 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:36:07,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-19 08:36:07,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:36:07,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:36:07,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:36:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:36:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 225 proven. 1 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2022-03-19 08:36:07,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:36:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 225 proven. 1 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2022-03-19 08:36:07,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359973364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:36:07,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:36:07,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 4, 4] total 83 [2022-03-19 08:36:07,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:36:07,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [938038996] [2022-03-19 08:36:07,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [938038996] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:36:07,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:36:07,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-19 08:36:07,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396785333] [2022-03-19 08:36:07,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:36:07,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-19 08:36:07,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:07,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-19 08:36:07,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-03-19 08:36:07,677 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:36:09,215 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2022-03-19 08:36:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-19 08:36:09,215 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-03-19 08:36:09,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:36:09,216 INFO L225 Difference]: With dead ends: 174 [2022-03-19 08:36:09,216 INFO L226 Difference]: Without dead ends: 167 [2022-03-19 08:36:09,217 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9631, Invalid=15491, Unknown=0, NotChecked=0, Total=25122 [2022-03-19 08:36:09,218 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:36:09,218 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:36:09,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-19 08:36:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-03-19 08:36:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2022-03-19 08:36:09,222 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 163 [2022-03-19 08:36:09,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:36:09,223 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2022-03-19 08:36:09,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:09,223 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2022-03-19 08:36:09,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-19 08:36:09,223 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:36:09,223 INFO L500 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:36:09,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-19 08:36:09,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable152 [2022-03-19 08:36:09,431 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:36:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:36:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1748894598, now seen corresponding path program 151 times [2022-03-19 08:36:09,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:09,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2123975903] [2022-03-19 08:36:09,611 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:36:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1012114608, now seen corresponding path program 1 times [2022-03-19 08:36:09,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:09,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047068066] [2022-03-19 08:36:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:09,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:09,614 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:36:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:09,617 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:36:09,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1748894598, now seen corresponding path program 152 times [2022-03-19 08:36:09,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:09,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911591207] [2022-03-19 08:36:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:09,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:10,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:36:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:10,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:36:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911591207] [2022-03-19 08:36:10,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911591207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:36:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274349423] [2022-03-19 08:36:10,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:36:10,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:36:10,855 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:36:10,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-19 08:36:10,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:36:10,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:36:10,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-19 08:36:10,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:36:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:11,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:36:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:14,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274349423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:36:14,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:36:14,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-19 08:36:14,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:36:14,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2123975903] [2022-03-19 08:36:14,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2123975903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:36:14,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:36:14,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-19 08:36:14,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364641083] [2022-03-19 08:36:14,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:36:14,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-19 08:36:14,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:14,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-19 08:36:14,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-03-19 08:36:14,727 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:16,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:36:16,351 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2022-03-19 08:36:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-19 08:36:16,351 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-03-19 08:36:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:36:16,352 INFO L225 Difference]: With dead ends: 176 [2022-03-19 08:36:16,352 INFO L226 Difference]: Without dead ends: 169 [2022-03-19 08:36:16,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-03-19 08:36:16,356 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:36:16,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 54 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:36:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-19 08:36:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-03-19 08:36:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2022-03-19 08:36:16,372 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 165 [2022-03-19 08:36:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:36:16,372 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2022-03-19 08:36:16,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2022-03-19 08:36:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-19 08:36:16,373 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:36:16,373 INFO L500 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:36:16,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-19 08:36:16,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,SelfDestructingSolverStorable154,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:16,579 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:36:16,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:36:16,580 INFO L85 PathProgramCache]: Analyzing trace with hash 556888471, now seen corresponding path program 153 times [2022-03-19 08:36:16,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:16,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2018139684] [2022-03-19 08:36:16,696 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:36:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash -953009264, now seen corresponding path program 1 times [2022-03-19 08:36:16,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:16,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740860778] [2022-03-19 08:36:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:16,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:16,698 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:36:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:16,699 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:36:16,700 INFO L85 PathProgramCache]: Analyzing trace with hash 556888471, now seen corresponding path program 154 times [2022-03-19 08:36:16,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:16,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693586282] [2022-03-19 08:36:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:16,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:17,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:36:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:17,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:36:17,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693586282] [2022-03-19 08:36:17,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693586282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:36:17,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628068627] [2022-03-19 08:36:17,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:36:17,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:17,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:36:17,811 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:36:17,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-19 08:36:17,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:36:17,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:36:17,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 08:36:17,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:36:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:18,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:36:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:22,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628068627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:36:22,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:36:22,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-03-19 08:36:22,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:36:22,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2018139684] [2022-03-19 08:36:22,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2018139684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:36:22,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:36:22,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-19 08:36:22,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195658539] [2022-03-19 08:36:22,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:36:22,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-19 08:36:22,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:22,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-19 08:36:22,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2022-03-19 08:36:22,194 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:36:23,852 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2022-03-19 08:36:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-19 08:36:23,879 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-03-19 08:36:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:36:23,880 INFO L225 Difference]: With dead ends: 178 [2022-03-19 08:36:23,880 INFO L226 Difference]: Without dead ends: 171 [2022-03-19 08:36:23,883 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=24966, Invalid=31440, Unknown=0, NotChecked=0, Total=56406 [2022-03-19 08:36:23,883 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 08:36:23,883 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 34 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 08:36:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-19 08:36:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-03-19 08:36:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2022-03-19 08:36:23,888 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2022-03-19 08:36:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:36:23,889 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2022-03-19 08:36:23,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2022-03-19 08:36:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-19 08:36:23,889 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:36:23,889 INFO L500 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:36:23,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-19 08:36:24,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-19 08:36:24,090 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:36:24,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:36:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash 211293044, now seen corresponding path program 155 times [2022-03-19 08:36:24,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:24,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [787304549] [2022-03-19 08:36:24,375 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:36:24,375 INFO L85 PathProgramCache]: Analyzing trace with hash -893903920, now seen corresponding path program 1 times [2022-03-19 08:36:24,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:24,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779174086] [2022-03-19 08:36:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:24,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:24,378 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:36:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:24,380 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:36:24,380 INFO L85 PathProgramCache]: Analyzing trace with hash 211293044, now seen corresponding path program 156 times [2022-03-19 08:36:24,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:24,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889622463] [2022-03-19 08:36:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:24,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:26,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:36:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:26,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:36:26,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889622463] [2022-03-19 08:36:26,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889622463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:36:26,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672558054] [2022-03-19 08:36:26,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:36:26,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:26,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:36:26,017 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:36:26,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-19 08:36:26,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:36:26,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:36:26,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:36:26,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:36:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 234 proven. 1 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2022-03-19 08:36:26,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:36:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 234 proven. 1 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2022-03-19 08:36:26,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672558054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:36:26,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:36:26,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 4, 4] total 86 [2022-03-19 08:36:26,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:36:26,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [787304549] [2022-03-19 08:36:26,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [787304549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:36:26,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:36:26,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-19 08:36:26,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641939639] [2022-03-19 08:36:26,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:36:26,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-19 08:36:26,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:26,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-19 08:36:26,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 08:36:26,335 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:36:28,514 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2022-03-19 08:36:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-19 08:36:28,514 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-03-19 08:36:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:36:28,515 INFO L225 Difference]: With dead ends: 180 [2022-03-19 08:36:28,515 INFO L226 Difference]: Without dead ends: 173 [2022-03-19 08:36:28,516 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10366, Invalid=16694, Unknown=0, NotChecked=0, Total=27060 [2022-03-19 08:36:28,516 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:36:28,516 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 54 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:36:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-19 08:36:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-19 08:36:28,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0178571428571428) internal successors, (171), 168 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2022-03-19 08:36:28,521 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 169 [2022-03-19 08:36:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:36:28,521 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2022-03-19 08:36:28,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2022-03-19 08:36:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-19 08:36:28,522 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:36:28,522 INFO L500 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:36:28,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-19 08:36:28,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,SelfDestructingSolverStorable158,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:28,723 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:36:28,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:36:28,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1193430511, now seen corresponding path program 157 times [2022-03-19 08:36:28,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:28,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1355803085] [2022-03-19 08:36:28,911 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:36:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash -834798576, now seen corresponding path program 1 times [2022-03-19 08:36:28,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:28,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92329297] [2022-03-19 08:36:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:28,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:28,913 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:36:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:28,915 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:36:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1193430511, now seen corresponding path program 158 times [2022-03-19 08:36:28,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:28,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865175615] [2022-03-19 08:36:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:28,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:30,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:36:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:30,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:36:30,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865175615] [2022-03-19 08:36:30,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865175615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:36:30,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449754158] [2022-03-19 08:36:30,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:36:30,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:30,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:36:30,389 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:36:30,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-19 08:36:30,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:36:30,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:36:30,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-19 08:36:30,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:36:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:30,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:36:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:34,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449754158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:36:34,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:36:34,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-19 08:36:34,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:36:34,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1355803085] [2022-03-19 08:36:34,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1355803085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:36:34,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:36:34,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-19 08:36:34,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611945008] [2022-03-19 08:36:34,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:36:34,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-19 08:36:34,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:34,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-19 08:36:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-03-19 08:36:34,162 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:36,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:36:36,464 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2022-03-19 08:36:36,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-19 08:36:36,465 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-03-19 08:36:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:36:36,465 INFO L225 Difference]: With dead ends: 182 [2022-03-19 08:36:36,465 INFO L226 Difference]: Without dead ends: 175 [2022-03-19 08:36:36,469 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-03-19 08:36:36,469 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:36:36,469 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 39 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:36:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-19 08:36:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-03-19 08:36:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2022-03-19 08:36:36,512 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 171 [2022-03-19 08:36:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:36:36,512 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2022-03-19 08:36:36,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2022-03-19 08:36:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-19 08:36:36,512 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:36:36,513 INFO L500 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:36:36,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-19 08:36:36,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160,SelfDestructingSolverStorable159 [2022-03-19 08:36:36,713 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:36:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:36:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1781931374, now seen corresponding path program 159 times [2022-03-19 08:36:36,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:36,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900564421] [2022-03-19 08:36:36,892 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:36:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash -775693232, now seen corresponding path program 1 times [2022-03-19 08:36:36,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:36,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393525398] [2022-03-19 08:36:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:36,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:36,895 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:36:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:36,910 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:36:36,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1781931374, now seen corresponding path program 160 times [2022-03-19 08:36:36,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:36,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914159439] [2022-03-19 08:36:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:36,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:38,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:36:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:38,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:36:38,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914159439] [2022-03-19 08:36:38,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914159439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:36:38,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405688111] [2022-03-19 08:36:38,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:36:38,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:38,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:36:38,152 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:36:38,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-19 08:36:38,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:36:38,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:36:38,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-19 08:36:38,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:36:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:38,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:36:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:41,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405688111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:36:41,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:36:41,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 166 [2022-03-19 08:36:41,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:36:41,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900564421] [2022-03-19 08:36:41,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900564421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:36:41,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:36:41,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-19 08:36:41,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030983979] [2022-03-19 08:36:41,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:36:41,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-19 08:36:41,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-19 08:36:41,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2022-03-19 08:36:41,987 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:36:43,635 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2022-03-19 08:36:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-19 08:36:43,635 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-19 08:36:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:36:43,636 INFO L225 Difference]: With dead ends: 184 [2022-03-19 08:36:43,636 INFO L226 Difference]: Without dead ends: 177 [2022-03-19 08:36:43,639 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3719 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=26898, Invalid=33864, Unknown=0, NotChecked=0, Total=60762 [2022-03-19 08:36:43,640 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:36:43,640 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 39 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:36:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-19 08:36:43,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-03-19 08:36:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2022-03-19 08:36:43,654 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 173 [2022-03-19 08:36:43,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:36:43,654 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2022-03-19 08:36:43,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:43,654 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2022-03-19 08:36:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-19 08:36:43,670 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:36:43,670 INFO L500 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:36:43,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-19 08:36:43,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-03-19 08:36:43,887 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:36:43,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:36:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash 656483723, now seen corresponding path program 161 times [2022-03-19 08:36:43,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:43,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637985395] [2022-03-19 08:36:44,106 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:36:44,107 INFO L85 PathProgramCache]: Analyzing trace with hash -716587888, now seen corresponding path program 1 times [2022-03-19 08:36:44,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:44,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618112345] [2022-03-19 08:36:44,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:44,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:44,109 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:36:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:44,110 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:36:44,110 INFO L85 PathProgramCache]: Analyzing trace with hash 656483723, now seen corresponding path program 162 times [2022-03-19 08:36:44,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:44,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306143484] [2022-03-19 08:36:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:44,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:45,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:36:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:45,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:36:45,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306143484] [2022-03-19 08:36:45,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306143484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:36:45,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879574684] [2022-03-19 08:36:45,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:36:45,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:45,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:36:45,827 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:36:45,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-19 08:36:45,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:36:45,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:36:45,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:36:45,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:36:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 243 proven. 1 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2022-03-19 08:36:46,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:36:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 243 proven. 1 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2022-03-19 08:36:46,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879574684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:36:46,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:36:46,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 4, 4] total 89 [2022-03-19 08:36:46,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:36:46,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637985395] [2022-03-19 08:36:46,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637985395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:36:46,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:36:46,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-19 08:36:46,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052989838] [2022-03-19 08:36:46,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:36:46,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-19 08:36:46,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:46,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-19 08:36:46,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-03-19 08:36:46,213 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:36:47,924 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2022-03-19 08:36:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-19 08:36:47,924 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-03-19 08:36:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:36:47,925 INFO L225 Difference]: With dead ends: 186 [2022-03-19 08:36:47,925 INFO L226 Difference]: Without dead ends: 179 [2022-03-19 08:36:47,926 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11128, Invalid=17942, Unknown=0, NotChecked=0, Total=29070 [2022-03-19 08:36:47,927 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:36:47,927 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 44 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:36:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-19 08:36:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-03-19 08:36:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2022-03-19 08:36:47,932 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 175 [2022-03-19 08:36:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:36:47,932 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2022-03-19 08:36:47,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2022-03-19 08:36:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-19 08:36:47,932 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:36:47,932 INFO L500 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:36:47,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-19 08:36:48,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,SelfDestructingSolverStorable164,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:48,140 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:36:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:36:48,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1433049704, now seen corresponding path program 163 times [2022-03-19 08:36:48,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:48,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1753694539] [2022-03-19 08:36:48,266 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:36:48,266 INFO L85 PathProgramCache]: Analyzing trace with hash -657482544, now seen corresponding path program 1 times [2022-03-19 08:36:48,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:48,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572952460] [2022-03-19 08:36:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:48,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:48,270 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:36:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:48,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:36:48,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1433049704, now seen corresponding path program 164 times [2022-03-19 08:36:48,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:48,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930243922] [2022-03-19 08:36:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:48,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:49,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:36:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:49,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:36:49,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930243922] [2022-03-19 08:36:49,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930243922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:36:49,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391395217] [2022-03-19 08:36:49,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:36:49,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:49,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:36:49,560 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:36:49,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-19 08:36:49,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:36:49,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:36:49,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-19 08:36:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:36:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:49,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:36:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:53,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391395217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:36:53,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:36:53,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-19 08:36:53,966 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:36:53,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1753694539] [2022-03-19 08:36:53,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1753694539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:36:53,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:36:53,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-19 08:36:53,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350232932] [2022-03-19 08:36:53,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:36:53,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-19 08:36:53,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:53,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-19 08:36:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-03-19 08:36:53,969 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:36:55,684 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2022-03-19 08:36:55,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-19 08:36:55,685 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-03-19 08:36:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:36:55,685 INFO L225 Difference]: With dead ends: 188 [2022-03-19 08:36:55,685 INFO L226 Difference]: Without dead ends: 181 [2022-03-19 08:36:55,689 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-03-19 08:36:55,689 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:36:55,689 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 54 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:36:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-19 08:36:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-03-19 08:36:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2022-03-19 08:36:55,695 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2022-03-19 08:36:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:36:55,695 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2022-03-19 08:36:55,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:36:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2022-03-19 08:36:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-19 08:36:55,696 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:36:55,696 INFO L500 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:36:55,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-19 08:36:55,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165,SelfDestructingSolverStorable166 [2022-03-19 08:36:55,909 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:36:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:36:55,909 INFO L85 PathProgramCache]: Analyzing trace with hash 388647941, now seen corresponding path program 165 times [2022-03-19 08:36:55,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:36:55,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679611598] [2022-03-19 08:36:56,032 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:36:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash -598377200, now seen corresponding path program 1 times [2022-03-19 08:36:56,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:56,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609875468] [2022-03-19 08:36:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:56,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:56,034 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:36:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:36:56,061 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:36:56,061 INFO L85 PathProgramCache]: Analyzing trace with hash 388647941, now seen corresponding path program 166 times [2022-03-19 08:36:56,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:36:56,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947383653] [2022-03-19 08:36:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:36:56,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:36:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:57,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:36:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:36:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:57,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:36:57,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947383653] [2022-03-19 08:36:57,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947383653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:36:57,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615391297] [2022-03-19 08:36:57,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:36:57,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:36:57,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:36:57,361 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:36:57,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-19 08:36:57,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:36:57,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:36:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-19 08:36:57,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:36:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:36:57,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:37:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:02,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615391297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:37:02,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:37:02,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 172 [2022-03-19 08:37:02,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:37:02,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679611598] [2022-03-19 08:37:02,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679611598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:37:02,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:37:02,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-19 08:37:02,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568096982] [2022-03-19 08:37:02,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:37:02,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-19 08:37:02,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-19 08:37:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2022-03-19 08:37:02,410 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:04,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:37:04,604 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2022-03-19 08:37:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-19 08:37:04,605 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-03-19 08:37:04,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:37:04,605 INFO L225 Difference]: With dead ends: 190 [2022-03-19 08:37:04,605 INFO L226 Difference]: Without dead ends: 183 [2022-03-19 08:37:04,608 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=28902, Invalid=36378, Unknown=0, NotChecked=0, Total=65280 [2022-03-19 08:37:04,608 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:37:04,608 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 44 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:37:04,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-19 08:37:04,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-03-19 08:37:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2022-03-19 08:37:04,613 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 179 [2022-03-19 08:37:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:37:04,613 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2022-03-19 08:37:04,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:04,613 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2022-03-19 08:37:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-19 08:37:04,614 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:37:04,614 INFO L500 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:37:04,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-19 08:37:04,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,SelfDestructingSolverStorable168,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:04,830 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:37:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:37:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1740900962, now seen corresponding path program 167 times [2022-03-19 08:37:04,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:04,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [589360253] [2022-03-19 08:37:04,985 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:37:04,986 INFO L85 PathProgramCache]: Analyzing trace with hash -539271856, now seen corresponding path program 1 times [2022-03-19 08:37:04,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:04,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111383189] [2022-03-19 08:37:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:04,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:04,988 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:37:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:04,990 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:37:04,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1740900962, now seen corresponding path program 168 times [2022-03-19 08:37:04,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:04,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938207826] [2022-03-19 08:37:04,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:04,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:07,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:37:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:07,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:37:07,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938207826] [2022-03-19 08:37:07,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938207826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:37:07,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009654491] [2022-03-19 08:37:07,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:37:07,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:07,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:37:07,033 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:37:07,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-19 08:37:07,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:37:07,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:37:07,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:37:07,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:37:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 252 proven. 1 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2022-03-19 08:37:07,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:37:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 252 proven. 1 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2022-03-19 08:37:07,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009654491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:37:07,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:37:07,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 4, 4] total 92 [2022-03-19 08:37:07,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:37:07,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [589360253] [2022-03-19 08:37:07,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [589360253] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:37:07,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:37:07,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-19 08:37:07,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687642985] [2022-03-19 08:37:07,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:37:07,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-19 08:37:07,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-19 08:37:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 08:37:07,366 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:37:09,630 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2022-03-19 08:37:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-19 08:37:09,630 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-03-19 08:37:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:37:09,631 INFO L225 Difference]: With dead ends: 192 [2022-03-19 08:37:09,631 INFO L226 Difference]: Without dead ends: 185 [2022-03-19 08:37:09,633 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11917, Invalid=19235, Unknown=0, NotChecked=0, Total=31152 [2022-03-19 08:37:09,633 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:37:09,633 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 39 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:37:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-19 08:37:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-03-19 08:37:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0166666666666666) internal successors, (183), 180 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2022-03-19 08:37:09,650 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2022-03-19 08:37:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:37:09,650 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2022-03-19 08:37:09,650 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:09,650 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2022-03-19 08:37:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-19 08:37:09,651 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:37:09,651 INFO L500 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:37:09,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-19 08:37:09,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-19 08:37:09,851 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:37:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:37:09,851 INFO L85 PathProgramCache]: Analyzing trace with hash -119036545, now seen corresponding path program 169 times [2022-03-19 08:37:09,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:09,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1268909392] [2022-03-19 08:37:09,989 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:37:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash -480166512, now seen corresponding path program 1 times [2022-03-19 08:37:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:09,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851241210] [2022-03-19 08:37:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:09,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:09,991 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:37:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:09,993 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:37:09,993 INFO L85 PathProgramCache]: Analyzing trace with hash -119036545, now seen corresponding path program 170 times [2022-03-19 08:37:09,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:09,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253442759] [2022-03-19 08:37:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:09,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:11,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:37:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:11,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:37:11,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253442759] [2022-03-19 08:37:11,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253442759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:37:11,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635989138] [2022-03-19 08:37:11,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:37:11,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:11,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:37:11,731 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:37:11,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-19 08:37:11,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:37:11,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:37:11,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 08:37:11,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:37:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:11,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:37:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:16,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635989138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:37:16,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:37:16,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-19 08:37:16,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:37:16,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1268909392] [2022-03-19 08:37:16,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1268909392] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:37:16,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:37:16,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-19 08:37:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309656719] [2022-03-19 08:37:16,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:37:16,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-19 08:37:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-19 08:37:16,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-03-19 08:37:16,064 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:37:17,945 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2022-03-19 08:37:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-19 08:37:17,945 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-03-19 08:37:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:37:17,946 INFO L225 Difference]: With dead ends: 194 [2022-03-19 08:37:17,946 INFO L226 Difference]: Without dead ends: 187 [2022-03-19 08:37:17,948 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-03-19 08:37:17,948 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:37:17,949 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 44 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:37:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-19 08:37:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-03-19 08:37:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2022-03-19 08:37:17,959 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 183 [2022-03-19 08:37:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:37:17,959 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2022-03-19 08:37:17,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:17,959 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2022-03-19 08:37:17,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-19 08:37:17,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:37:17,960 INFO L500 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:37:17,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-19 08:37:18,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,SelfDestructingSolverStorable172,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:18,175 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:37:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:37:18,176 INFO L85 PathProgramCache]: Analyzing trace with hash -812585636, now seen corresponding path program 171 times [2022-03-19 08:37:18,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:18,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807500542] [2022-03-19 08:37:18,369 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:37:18,369 INFO L85 PathProgramCache]: Analyzing trace with hash -421061168, now seen corresponding path program 1 times [2022-03-19 08:37:18,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:18,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744085967] [2022-03-19 08:37:18,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:18,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:18,372 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:37:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:18,374 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:37:18,374 INFO L85 PathProgramCache]: Analyzing trace with hash -812585636, now seen corresponding path program 172 times [2022-03-19 08:37:18,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:18,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035625403] [2022-03-19 08:37:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:18,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:20,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:37:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:20,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:37:20,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035625403] [2022-03-19 08:37:20,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035625403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:37:20,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638566987] [2022-03-19 08:37:20,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:37:20,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:20,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:37:20,424 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:37:20,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-19 08:37:20,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:37:20,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:37:20,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-19 08:37:20,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:37:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:20,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:37:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:25,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638566987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:37:25,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:37:25,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 178 [2022-03-19 08:37:25,395 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:37:25,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807500542] [2022-03-19 08:37:25,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807500542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:37:25,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:37:25,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-19 08:37:25,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463314812] [2022-03-19 08:37:25,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:37:25,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-19 08:37:25,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-19 08:37:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15578, Invalid=15928, Unknown=0, NotChecked=0, Total=31506 [2022-03-19 08:37:25,398 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:37:27,564 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2022-03-19 08:37:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-19 08:37:27,564 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-03-19 08:37:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:37:27,565 INFO L225 Difference]: With dead ends: 196 [2022-03-19 08:37:27,565 INFO L226 Difference]: Without dead ends: 189 [2022-03-19 08:37:27,569 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4256 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=30978, Invalid=38982, Unknown=0, NotChecked=0, Total=69960 [2022-03-19 08:37:27,569 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:37:27,569 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 39 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:37:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-19 08:37:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-19 08:37:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.016304347826087) internal successors, (187), 184 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2022-03-19 08:37:27,574 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 185 [2022-03-19 08:37:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:37:27,575 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2022-03-19 08:37:27,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2022-03-19 08:37:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-19 08:37:27,575 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:37:27,575 INFO L500 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:37:27,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-19 08:37:27,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,SelfDestructingSolverStorable174,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:27,776 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:37:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:37:27,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1593331207, now seen corresponding path program 173 times [2022-03-19 08:37:27,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:27,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193177912] [2022-03-19 08:37:27,965 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:37:27,965 INFO L85 PathProgramCache]: Analyzing trace with hash -361955824, now seen corresponding path program 1 times [2022-03-19 08:37:27,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:27,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675796976] [2022-03-19 08:37:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:27,976 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:37:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:27,977 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:37:27,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1593331207, now seen corresponding path program 174 times [2022-03-19 08:37:27,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:27,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548825436] [2022-03-19 08:37:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:27,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:29,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:37:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:29,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:37:29,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548825436] [2022-03-19 08:37:29,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548825436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:37:29,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599725132] [2022-03-19 08:37:29,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:37:29,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:29,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:37:29,578 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:37:29,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-19 08:37:29,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:37:29,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:37:29,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:37:29,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:37:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 261 proven. 1 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2022-03-19 08:37:29,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:37:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 261 proven. 1 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2022-03-19 08:37:29,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599725132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:37:29,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:37:29,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 4, 4] total 95 [2022-03-19 08:37:29,924 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:37:29,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193177912] [2022-03-19 08:37:29,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193177912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:37:29,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:37:29,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-19 08:37:29,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873939414] [2022-03-19 08:37:29,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:37:29,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-19 08:37:29,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:29,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-19 08:37:29,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-03-19 08:37:29,925 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:37:31,841 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2022-03-19 08:37:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-19 08:37:31,841 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-03-19 08:37:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:37:31,842 INFO L225 Difference]: With dead ends: 198 [2022-03-19 08:37:31,842 INFO L226 Difference]: Without dead ends: 191 [2022-03-19 08:37:31,843 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=12733, Invalid=20573, Unknown=0, NotChecked=0, Total=33306 [2022-03-19 08:37:31,843 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:37:31,844 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 34 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:37:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-19 08:37:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-19 08:37:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0161290322580645) internal successors, (189), 186 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2022-03-19 08:37:31,849 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2022-03-19 08:37:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:37:31,849 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2022-03-19 08:37:31,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2022-03-19 08:37:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-19 08:37:31,850 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:37:31,850 INFO L500 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:37:31,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-19 08:37:32,065 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,SelfDestructingSolverStorable176,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:32,066 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:37:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:37:32,066 INFO L85 PathProgramCache]: Analyzing trace with hash -270548138, now seen corresponding path program 175 times [2022-03-19 08:37:32,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:32,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [517306223] [2022-03-19 08:37:32,213 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:37:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash -302850480, now seen corresponding path program 1 times [2022-03-19 08:37:32,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:32,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822849824] [2022-03-19 08:37:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:32,216 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:37:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:32,217 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:37:32,217 INFO L85 PathProgramCache]: Analyzing trace with hash -270548138, now seen corresponding path program 176 times [2022-03-19 08:37:32,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:32,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820309047] [2022-03-19 08:37:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:32,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:33,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:37:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:33,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:37:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820309047] [2022-03-19 08:37:33,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820309047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:37:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454706743] [2022-03-19 08:37:33,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:37:33,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:33,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:37:33,637 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:37:33,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-19 08:37:33,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:37:33,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:37:33,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-19 08:37:33,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:37:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:33,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:37:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:38,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454706743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:37:38,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:37:38,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-19 08:37:38,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:37:38,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [517306223] [2022-03-19 08:37:38,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [517306223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:37:38,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:37:38,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-19 08:37:38,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889163991] [2022-03-19 08:37:38,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:37:38,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-19 08:37:38,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-19 08:37:38,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16292, Invalid=16650, Unknown=0, NotChecked=0, Total=32942 [2022-03-19 08:37:38,399 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:37:40,595 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2022-03-19 08:37:40,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-19 08:37:40,595 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-03-19 08:37:40,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:37:40,596 INFO L225 Difference]: With dead ends: 200 [2022-03-19 08:37:40,596 INFO L226 Difference]: Without dead ends: 193 [2022-03-19 08:37:40,598 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=32402, Invalid=40768, Unknown=0, NotChecked=0, Total=73170 [2022-03-19 08:37:40,599 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:37:40,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 19 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:37:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-19 08:37:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-03-19 08:37:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2022-03-19 08:37:40,604 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 189 [2022-03-19 08:37:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:37:40,604 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2022-03-19 08:37:40,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2022-03-19 08:37:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-19 08:37:40,605 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:37:40,605 INFO L500 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:37:40,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-19 08:37:40,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177,SelfDestructingSolverStorable178 [2022-03-19 08:37:40,818 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:37:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:37:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash -386338445, now seen corresponding path program 177 times [2022-03-19 08:37:40,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:40,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [753826936] [2022-03-19 08:37:40,999 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:37:40,999 INFO L85 PathProgramCache]: Analyzing trace with hash -243745136, now seen corresponding path program 1 times [2022-03-19 08:37:40,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:40,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195889309] [2022-03-19 08:37:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:41,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:41,001 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:37:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:41,003 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:37:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash -386338445, now seen corresponding path program 178 times [2022-03-19 08:37:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:41,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956060345] [2022-03-19 08:37:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:41,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:42,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:37:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:42,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:37:42,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956060345] [2022-03-19 08:37:42,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956060345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:37:42,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787401833] [2022-03-19 08:37:42,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:37:42,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:42,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:37:42,534 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:37:42,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-19 08:37:42,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:37:42,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:37:42,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-19 08:37:42,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:37:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:42,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:37:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:48,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787401833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:37:48,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:37:48,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 184 [2022-03-19 08:37:48,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:37:48,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [753826936] [2022-03-19 08:37:48,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [753826936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:37:48,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:37:48,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-19 08:37:48,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899968926] [2022-03-19 08:37:48,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:37:48,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-19 08:37:48,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-19 08:37:48,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16655, Invalid=17017, Unknown=0, NotChecked=0, Total=33672 [2022-03-19 08:37:48,404 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:50,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:37:50,442 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2022-03-19 08:37:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-19 08:37:50,442 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-03-19 08:37:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:37:50,442 INFO L225 Difference]: With dead ends: 202 [2022-03-19 08:37:50,442 INFO L226 Difference]: Without dead ends: 195 [2022-03-19 08:37:50,445 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4538 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=33126, Invalid=41676, Unknown=0, NotChecked=0, Total=74802 [2022-03-19 08:37:50,445 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:37:50,445 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 39 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:37:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-19 08:37:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-03-19 08:37:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2022-03-19 08:37:50,451 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 191 [2022-03-19 08:37:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:37:50,451 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2022-03-19 08:37:50,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2022-03-19 08:37:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-19 08:37:50,452 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:37:50,452 INFO L500 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:37:50,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-19 08:37:50,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180,SelfDestructingSolverStorable179 [2022-03-19 08:37:50,669 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:37:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:37:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash 8326224, now seen corresponding path program 179 times [2022-03-19 08:37:50,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:50,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1090500903] [2022-03-19 08:37:50,875 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:37:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash -184639792, now seen corresponding path program 1 times [2022-03-19 08:37:50,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:50,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741683423] [2022-03-19 08:37:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:50,877 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:37:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:50,879 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:37:50,879 INFO L85 PathProgramCache]: Analyzing trace with hash 8326224, now seen corresponding path program 180 times [2022-03-19 08:37:50,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:50,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455867307] [2022-03-19 08:37:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:50,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:52,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:37:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 91 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:52,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:37:52,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455867307] [2022-03-19 08:37:52,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455867307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:37:52,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081962058] [2022-03-19 08:37:52,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:37:52,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:52,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:37:52,877 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:37:52,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-19 08:37:52,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:37:52,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:37:52,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:37:52,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:37:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 270 proven. 1 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2022-03-19 08:37:53,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:37:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 270 proven. 1 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2022-03-19 08:37:53,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081962058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:37:53,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:37:53,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 4, 4] total 98 [2022-03-19 08:37:53,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:37:53,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1090500903] [2022-03-19 08:37:53,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1090500903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:37:53,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:37:53,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-19 08:37:53,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601096517] [2022-03-19 08:37:53,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:37:53,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-19 08:37:53,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:53,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-19 08:37:53,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 08:37:53,481 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:37:55,656 INFO L93 Difference]: Finished difference Result 204 states and 208 transitions. [2022-03-19 08:37:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-19 08:37:55,657 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-03-19 08:37:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:37:55,657 INFO L225 Difference]: With dead ends: 204 [2022-03-19 08:37:55,657 INFO L226 Difference]: Without dead ends: 197 [2022-03-19 08:37:55,660 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=13576, Invalid=21956, Unknown=0, NotChecked=0, Total=35532 [2022-03-19 08:37:55,660 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:37:55,660 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 39 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:37:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-19 08:37:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-03-19 08:37:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.015625) internal successors, (195), 192 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2022-03-19 08:37:55,666 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 193 [2022-03-19 08:37:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:37:55,666 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2022-03-19 08:37:55,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:37:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2022-03-19 08:37:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-19 08:37:55,667 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:37:55,667 INFO L500 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:37:55,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-19 08:37:55,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,SelfDestructingSolverStorable182,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:55,883 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:37:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:37:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1323951085, now seen corresponding path program 181 times [2022-03-19 08:37:55,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:37:55,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2073203877] [2022-03-19 08:37:56,152 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:37:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash -125534448, now seen corresponding path program 1 times [2022-03-19 08:37:56,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:56,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921887571] [2022-03-19 08:37:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:56,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:56,155 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:37:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:37:56,156 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:37:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1323951085, now seen corresponding path program 182 times [2022-03-19 08:37:56,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:37:56,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300077345] [2022-03-19 08:37:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:37:56,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:37:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:57,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:37:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:37:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:57,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:37:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300077345] [2022-03-19 08:37:57,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300077345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:37:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407975962] [2022-03-19 08:37:57,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:37:57,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:37:57,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:37:57,760 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:37:57,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-19 08:37:57,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:37:57,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:37:57,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-19 08:37:57,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:37:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:37:58,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:38:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:02,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407975962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:38:02,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:38:02,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-03-19 08:38:02,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:38:02,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2073203877] [2022-03-19 08:38:02,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2073203877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:38:02,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:38:02,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-19 08:38:02,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301132032] [2022-03-19 08:38:02,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:38:02,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-19 08:38:02,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:02,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-19 08:38:02,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17393, Invalid=17763, Unknown=0, NotChecked=0, Total=35156 [2022-03-19 08:38:02,656 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:38:04,889 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2022-03-19 08:38:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-19 08:38:04,890 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-03-19 08:38:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:38:04,890 INFO L225 Difference]: With dead ends: 206 [2022-03-19 08:38:04,890 INFO L226 Difference]: Without dead ends: 199 [2022-03-19 08:38:04,893 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4731 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=34598, Invalid=43522, Unknown=0, NotChecked=0, Total=78120 [2022-03-19 08:38:04,893 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:38:04,893 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 54 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:38:04,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-19 08:38:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-03-19 08:38:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2022-03-19 08:38:04,899 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 195 [2022-03-19 08:38:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:38:04,899 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2022-03-19 08:38:04,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2022-03-19 08:38:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-19 08:38:04,900 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:38:04,900 INFO L500 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:38:04,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-19 08:38:05,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,SelfDestructingSolverStorable183,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:38:05,108 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:38:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:38:05,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1375909814, now seen corresponding path program 183 times [2022-03-19 08:38:05,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:05,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1019842093] [2022-03-19 08:38:05,282 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:38:05,283 INFO L85 PathProgramCache]: Analyzing trace with hash -66429104, now seen corresponding path program 1 times [2022-03-19 08:38:05,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:05,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907877483] [2022-03-19 08:38:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:05,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:05,285 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:38:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:05,286 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:38:05,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1375909814, now seen corresponding path program 184 times [2022-03-19 08:38:05,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:05,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164460814] [2022-03-19 08:38:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:05,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:07,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:38:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:07,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:38:07,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164460814] [2022-03-19 08:38:07,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164460814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:38:07,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754207103] [2022-03-19 08:38:07,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:38:07,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:38:07,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:38:07,193 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:38:07,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-19 08:38:07,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:38:07,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:38:07,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-19 08:38:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:38:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:07,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:38:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:12,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754207103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:38:12,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:38:12,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-03-19 08:38:12,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:38:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1019842093] [2022-03-19 08:38:12,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1019842093] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:38:12,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:38:12,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-19 08:38:12,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855968937] [2022-03-19 08:38:12,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:38:12,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-19 08:38:12,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-19 08:38:12,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-03-19 08:38:12,579 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:15,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:38:15,205 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2022-03-19 08:38:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-19 08:38:15,206 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-03-19 08:38:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:38:15,207 INFO L225 Difference]: With dead ends: 208 [2022-03-19 08:38:15,207 INFO L226 Difference]: Without dead ends: 201 [2022-03-19 08:38:15,210 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4829 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=35346, Invalid=44460, Unknown=0, NotChecked=0, Total=79806 [2022-03-19 08:38:15,210 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:38:15,210 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 29 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:38:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-19 08:38:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-03-19 08:38:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2022-03-19 08:38:15,216 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 197 [2022-03-19 08:38:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:38:15,216 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2022-03-19 08:38:15,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2022-03-19 08:38:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-19 08:38:15,217 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:38:15,217 INFO L500 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:38:15,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-19 08:38:15,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,SelfDestructingSolverStorable186,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:38:15,417 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:38:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:38:15,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1781986969, now seen corresponding path program 185 times [2022-03-19 08:38:15,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:15,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2133016447] [2022-03-19 08:38:15,651 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:38:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash -7323760, now seen corresponding path program 1 times [2022-03-19 08:38:15,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:15,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296113673] [2022-03-19 08:38:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:15,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:15,654 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:38:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:15,655 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:38:15,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1781986969, now seen corresponding path program 186 times [2022-03-19 08:38:15,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:15,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550476813] [2022-03-19 08:38:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:15,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:18,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:38:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:18,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:38:18,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550476813] [2022-03-19 08:38:18,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550476813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:38:18,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742004264] [2022-03-19 08:38:18,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:38:18,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:38:18,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:38:18,336 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:38:18,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-19 08:38:18,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:38:18,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:38:18,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:38:18,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:38:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 279 proven. 1 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2022-03-19 08:38:18,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:38:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 279 proven. 1 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2022-03-19 08:38:18,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742004264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:38:18,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:38:18,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 4, 4] total 101 [2022-03-19 08:38:18,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:38:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2133016447] [2022-03-19 08:38:18,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2133016447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:38:18,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:38:18,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-19 08:38:18,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340709728] [2022-03-19 08:38:18,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:38:18,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-19 08:38:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-19 08:38:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-03-19 08:38:18,980 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:38:21,700 INFO L93 Difference]: Finished difference Result 210 states and 214 transitions. [2022-03-19 08:38:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-19 08:38:21,701 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-03-19 08:38:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:38:21,702 INFO L225 Difference]: With dead ends: 210 [2022-03-19 08:38:21,702 INFO L226 Difference]: Without dead ends: 203 [2022-03-19 08:38:21,704 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=14446, Invalid=23384, Unknown=0, NotChecked=0, Total=37830 [2022-03-19 08:38:21,704 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:38:21,704 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 49 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:38:21,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-19 08:38:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-03-19 08:38:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2022-03-19 08:38:21,712 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 199 [2022-03-19 08:38:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:38:21,713 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2022-03-19 08:38:21,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2022-03-19 08:38:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-19 08:38:21,713 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:38:21,713 INFO L500 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:38:21,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-19 08:38:21,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-19 08:38:21,915 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:38:21,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:38:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1180108988, now seen corresponding path program 187 times [2022-03-19 08:38:21,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:21,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [206545115] [2022-03-19 08:38:22,103 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:38:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash 51781584, now seen corresponding path program 1 times [2022-03-19 08:38:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:22,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042834922] [2022-03-19 08:38:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:22,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:22,105 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:38:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:22,107 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:38:22,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1180108988, now seen corresponding path program 188 times [2022-03-19 08:38:22,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:22,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589013390] [2022-03-19 08:38:22,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:22,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:24,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:38:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:24,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:38:24,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589013390] [2022-03-19 08:38:24,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589013390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:38:24,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785162848] [2022-03-19 08:38:24,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:38:24,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:38:24,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:38:24,207 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:38:24,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-19 08:38:24,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:38:24,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:38:24,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-19 08:38:24,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:38:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:24,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:38:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:29,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785162848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:38:29,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:38:29,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-03-19 08:38:29,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:38:29,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [206545115] [2022-03-19 08:38:29,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [206545115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:38:29,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:38:29,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-19 08:38:29,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345984676] [2022-03-19 08:38:29,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:38:29,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-19 08:38:29,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-19 08:38:29,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18530, Invalid=18912, Unknown=0, NotChecked=0, Total=37442 [2022-03-19 08:38:29,456 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:38:31,785 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2022-03-19 08:38:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-19 08:38:31,785 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-03-19 08:38:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:38:31,786 INFO L225 Difference]: With dead ends: 212 [2022-03-19 08:38:31,786 INFO L226 Difference]: Without dead ends: 205 [2022-03-19 08:38:31,790 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5028 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=36866, Invalid=46366, Unknown=0, NotChecked=0, Total=83232 [2022-03-19 08:38:31,791 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:38:31,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 34 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:38:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-19 08:38:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-03-19 08:38:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.015) internal successors, (203), 200 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2022-03-19 08:38:31,799 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 201 [2022-03-19 08:38:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:38:31,799 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2022-03-19 08:38:31,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2022-03-19 08:38:31,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-19 08:38:31,800 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:38:31,800 INFO L500 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:38:31,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-19 08:38:32,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190,SelfDestructingSolverStorable189 [2022-03-19 08:38:32,018 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:38:32,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:38:32,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1699013089, now seen corresponding path program 189 times [2022-03-19 08:38:32,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:32,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1570468641] [2022-03-19 08:38:32,153 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:38:32,153 INFO L85 PathProgramCache]: Analyzing trace with hash 110886928, now seen corresponding path program 1 times [2022-03-19 08:38:32,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:32,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373053107] [2022-03-19 08:38:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:32,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:32,156 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:38:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:32,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:38:32,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1699013089, now seen corresponding path program 190 times [2022-03-19 08:38:32,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:32,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030923184] [2022-03-19 08:38:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:32,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:34,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:38:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:34,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:38:34,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030923184] [2022-03-19 08:38:34,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030923184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:38:34,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471928153] [2022-03-19 08:38:34,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:38:34,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:38:34,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:38:34,607 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:38:34,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-19 08:38:34,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:38:34,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:38:34,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-19 08:38:34,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:38:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:34,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:38:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:40,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471928153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:38:40,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:38:40,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-03-19 08:38:40,029 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:38:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1570468641] [2022-03-19 08:38:40,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1570468641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:38:40,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:38:40,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-19 08:38:40,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973864506] [2022-03-19 08:38:40,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:38:40,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-19 08:38:40,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:40,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-19 08:38:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18917, Invalid=19303, Unknown=0, NotChecked=0, Total=38220 [2022-03-19 08:38:40,032 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:42,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:38:42,858 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2022-03-19 08:38:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-19 08:38:42,859 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-03-19 08:38:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:38:42,859 INFO L225 Difference]: With dead ends: 214 [2022-03-19 08:38:42,859 INFO L226 Difference]: Without dead ends: 207 [2022-03-19 08:38:42,863 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5129 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=37638, Invalid=47334, Unknown=0, NotChecked=0, Total=84972 [2022-03-19 08:38:42,864 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:38:42,864 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 49 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:38:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-19 08:38:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-03-19 08:38:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2022-03-19 08:38:42,869 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 203 [2022-03-19 08:38:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:38:42,869 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2022-03-19 08:38:42,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2022-03-19 08:38:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-19 08:38:42,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:38:42,870 INFO L500 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:38:42,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-19 08:38:43,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191,SelfDestructingSolverStorable192 [2022-03-19 08:38:43,074 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:38:43,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:38:43,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1718576834, now seen corresponding path program 191 times [2022-03-19 08:38:43,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:43,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499070845] [2022-03-19 08:38:43,337 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:38:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash 169992272, now seen corresponding path program 1 times [2022-03-19 08:38:43,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:43,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737779229] [2022-03-19 08:38:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:43,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:43,340 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:38:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:43,342 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:38:43,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1718576834, now seen corresponding path program 192 times [2022-03-19 08:38:43,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:43,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476042823] [2022-03-19 08:38:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:43,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:45,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:38:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 97 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:45,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:38:45,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476042823] [2022-03-19 08:38:45,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476042823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:38:45,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523956634] [2022-03-19 08:38:45,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:38:45,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:38:45,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:38:45,923 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:38:45,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-19 08:38:45,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:38:45,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:38:45,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:38:45,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:38:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 288 proven. 1 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2022-03-19 08:38:46,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:38:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 288 proven. 1 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2022-03-19 08:38:46,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523956634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:38:46,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:38:46,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 4, 4] total 104 [2022-03-19 08:38:46,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:38:46,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499070845] [2022-03-19 08:38:46,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499070845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:38:46,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:38:46,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-19 08:38:46,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489689735] [2022-03-19 08:38:46,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:38:46,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-19 08:38:46,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:46,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-19 08:38:46,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 08:38:46,330 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:38:48,704 INFO L93 Difference]: Finished difference Result 216 states and 220 transitions. [2022-03-19 08:38:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-19 08:38:48,705 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-03-19 08:38:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:38:48,706 INFO L225 Difference]: With dead ends: 216 [2022-03-19 08:38:48,706 INFO L226 Difference]: Without dead ends: 209 [2022-03-19 08:38:48,708 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15343, Invalid=24857, Unknown=0, NotChecked=0, Total=40200 [2022-03-19 08:38:48,708 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:38:48,708 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 34 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:38:48,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-19 08:38:48,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-19 08:38:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0147058823529411) internal successors, (207), 204 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2022-03-19 08:38:48,714 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 205 [2022-03-19 08:38:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:38:48,714 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2022-03-19 08:38:48,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2022-03-19 08:38:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-19 08:38:48,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:38:48,715 INFO L500 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:38:48,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-19 08:38:48,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,SelfDestructingSolverStorable194,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:38:48,928 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:38:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:38:48,928 INFO L85 PathProgramCache]: Analyzing trace with hash -372511397, now seen corresponding path program 193 times [2022-03-19 08:38:48,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:48,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [372372984] [2022-03-19 08:38:49,157 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:38:49,158 INFO L85 PathProgramCache]: Analyzing trace with hash 229097616, now seen corresponding path program 1 times [2022-03-19 08:38:49,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:49,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881061872] [2022-03-19 08:38:49,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:49,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:49,160 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:38:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:49,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:38:49,161 INFO L85 PathProgramCache]: Analyzing trace with hash -372511397, now seen corresponding path program 194 times [2022-03-19 08:38:49,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:49,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229391746] [2022-03-19 08:38:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:49,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:51,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:38:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:38:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:51,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:38:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229391746] [2022-03-19 08:38:51,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229391746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:38:51,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817001669] [2022-03-19 08:38:51,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:38:51,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:38:51,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:38:51,072 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:38:51,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-19 08:38:51,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:38:51,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:38:51,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-19 08:38:51,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:38:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:51,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:38:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:38:56,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817001669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:38:56,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:38:56,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 200 [2022-03-19 08:38:56,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:38:56,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [372372984] [2022-03-19 08:38:56,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [372372984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:38:56,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:38:56,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-19 08:38:56,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502563602] [2022-03-19 08:38:56,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:38:56,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-19 08:38:56,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:56,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-19 08:38:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19703, Invalid=20097, Unknown=0, NotChecked=0, Total=39800 [2022-03-19 08:38:56,483 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:38:59,073 INFO L93 Difference]: Finished difference Result 218 states and 222 transitions. [2022-03-19 08:38:59,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-19 08:38:59,073 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-03-19 08:38:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:38:59,074 INFO L225 Difference]: With dead ends: 218 [2022-03-19 08:38:59,074 INFO L226 Difference]: Without dead ends: 211 [2022-03-19 08:38:59,077 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5334 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=39206, Invalid=49300, Unknown=0, NotChecked=0, Total=88506 [2022-03-19 08:38:59,078 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:38:59,078 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 49 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:38:59,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-19 08:38:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-03-19 08:38:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2022-03-19 08:38:59,084 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2022-03-19 08:38:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:38:59,084 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2022-03-19 08:38:59,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:38:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2022-03-19 08:38:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-19 08:38:59,084 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:38:59,084 INFO L500 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:38:59,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-19 08:38:59,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,SelfDestructingSolverStorable196,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:38:59,288 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:38:59,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:38:59,288 INFO L85 PathProgramCache]: Analyzing trace with hash 411217464, now seen corresponding path program 195 times [2022-03-19 08:38:59,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:38:59,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1440118190] [2022-03-19 08:38:59,504 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:38:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash 288202960, now seen corresponding path program 1 times [2022-03-19 08:38:59,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:59,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724489070] [2022-03-19 08:38:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:59,507 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:38:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:38:59,508 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:38:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash 411217464, now seen corresponding path program 196 times [2022-03-19 08:38:59,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:38:59,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559204048] [2022-03-19 08:38:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:38:59,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:38:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:01,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:39:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:01,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:39:01,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559204048] [2022-03-19 08:39:01,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559204048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:39:01,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528108612] [2022-03-19 08:39:01,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:39:01,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:39:01,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:39:01,753 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:39:01,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-19 08:39:01,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:39:01,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:39:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-19 08:39:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:39:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:02,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:39:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:07,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528108612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:39:07,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:39:07,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2022-03-19 08:39:07,518 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:39:07,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1440118190] [2022-03-19 08:39:07,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1440118190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:39:07,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:39:07,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-19 08:39:07,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043364254] [2022-03-19 08:39:07,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:39:07,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-19 08:39:07,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-19 08:39:07,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20102, Invalid=20500, Unknown=0, NotChecked=0, Total=40602 [2022-03-19 08:39:07,522 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:39:10,482 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2022-03-19 08:39:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-19 08:39:10,483 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-03-19 08:39:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:39:10,484 INFO L225 Difference]: With dead ends: 220 [2022-03-19 08:39:10,484 INFO L226 Difference]: Without dead ends: 213 [2022-03-19 08:39:10,487 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5438 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=40002, Invalid=50298, Unknown=0, NotChecked=0, Total=90300 [2022-03-19 08:39:10,488 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:39:10,488 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 24 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:39:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-19 08:39:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-03-19 08:39:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0144230769230769) internal successors, (211), 208 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2022-03-19 08:39:10,495 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 209 [2022-03-19 08:39:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:39:10,495 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2022-03-19 08:39:10,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2022-03-19 08:39:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-19 08:39:10,496 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:39:10,496 INFO L500 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:39:10,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-19 08:39:10,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,SelfDestructingSolverStorable198,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:39:10,707 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:39:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:39:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1955376085, now seen corresponding path program 197 times [2022-03-19 08:39:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:10,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [946125447] [2022-03-19 08:39:10,878 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:39:10,878 INFO L85 PathProgramCache]: Analyzing trace with hash 347308304, now seen corresponding path program 1 times [2022-03-19 08:39:10,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:10,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884849122] [2022-03-19 08:39:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:10,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:10,881 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:39:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:10,883 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:39:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1955376085, now seen corresponding path program 198 times [2022-03-19 08:39:10,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:10,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139914833] [2022-03-19 08:39:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:10,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:12,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:39:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:12,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:39:12,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139914833] [2022-03-19 08:39:12,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139914833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:39:12,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945113465] [2022-03-19 08:39:12,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:39:12,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:39:12,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:39:12,908 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:39:12,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-19 08:39:12,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:39:12,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:39:12,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:39:12,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:39:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 297 proven. 1 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2022-03-19 08:39:13,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:39:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 297 proven. 1 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2022-03-19 08:39:13,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945113465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:39:13,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:39:13,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 4, 4] total 107 [2022-03-19 08:39:13,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:39:13,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [946125447] [2022-03-19 08:39:13,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [946125447] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:39:13,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:39:13,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-19 08:39:13,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930198155] [2022-03-19 08:39:13,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:39:13,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-19 08:39:13,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:13,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-19 08:39:13,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-03-19 08:39:13,307 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:16,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:39:16,281 INFO L93 Difference]: Finished difference Result 222 states and 226 transitions. [2022-03-19 08:39:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-19 08:39:16,281 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-03-19 08:39:16,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:39:16,282 INFO L225 Difference]: With dead ends: 222 [2022-03-19 08:39:16,282 INFO L226 Difference]: Without dead ends: 215 [2022-03-19 08:39:16,283 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=16267, Invalid=26375, Unknown=0, NotChecked=0, Total=42642 [2022-03-19 08:39:16,284 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:39:16,284 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 39 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:39:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-19 08:39:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-03-19 08:39:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0142857142857142) internal successors, (213), 210 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2022-03-19 08:39:16,292 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 211 [2022-03-19 08:39:16,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:39:16,292 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2022-03-19 08:39:16,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2022-03-19 08:39:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-19 08:39:16,293 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:39:16,294 INFO L500 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:39:16,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-19 08:39:16,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,SelfDestructingSolverStorable200,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:39:16,506 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:39:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:39:16,506 INFO L85 PathProgramCache]: Analyzing trace with hash -166873550, now seen corresponding path program 199 times [2022-03-19 08:39:16,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:16,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2028979205] [2022-03-19 08:39:16,722 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:39:16,722 INFO L85 PathProgramCache]: Analyzing trace with hash 406413648, now seen corresponding path program 1 times [2022-03-19 08:39:16,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:16,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194583482] [2022-03-19 08:39:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:16,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:16,725 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:39:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:16,733 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:39:16,733 INFO L85 PathProgramCache]: Analyzing trace with hash -166873550, now seen corresponding path program 200 times [2022-03-19 08:39:16,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:16,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042130801] [2022-03-19 08:39:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:16,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:18,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:39:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:18,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:39:18,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042130801] [2022-03-19 08:39:18,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042130801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:39:18,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421996531] [2022-03-19 08:39:18,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:39:18,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:39:18,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:39:18,877 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:39:18,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-19 08:39:18,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:39:18,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:39:18,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 102 conjunts are in the unsatisfiable core [2022-03-19 08:39:18,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:39:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:19,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:39:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:24,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421996531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:39:24,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:39:24,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 103, 103] total 206 [2022-03-19 08:39:24,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:39:24,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2028979205] [2022-03-19 08:39:24,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2028979205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:39:24,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:39:24,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-19 08:39:24,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555638650] [2022-03-19 08:39:24,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:39:24,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-19 08:39:24,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:24,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-19 08:39:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20912, Invalid=21318, Unknown=0, NotChecked=0, Total=42230 [2022-03-19 08:39:24,575 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:39:27,163 INFO L93 Difference]: Finished difference Result 224 states and 228 transitions. [2022-03-19 08:39:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-19 08:39:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-03-19 08:39:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:39:27,164 INFO L225 Difference]: With dead ends: 224 [2022-03-19 08:39:27,164 INFO L226 Difference]: Without dead ends: 217 [2022-03-19 08:39:27,167 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5649 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=41618, Invalid=52324, Unknown=0, NotChecked=0, Total=93942 [2022-03-19 08:39:27,168 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:39:27,168 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 44 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:39:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-19 08:39:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-03-19 08:39:27,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2022-03-19 08:39:27,176 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 213 [2022-03-19 08:39:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:39:27,176 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2022-03-19 08:39:27,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:27,176 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2022-03-19 08:39:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-03-19 08:39:27,177 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:39:27,177 INFO L500 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:39:27,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-19 08:39:27,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201,SelfDestructingSolverStorable202 [2022-03-19 08:39:27,394 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:39:27,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:39:27,394 INFO L85 PathProgramCache]: Analyzing trace with hash 460692815, now seen corresponding path program 201 times [2022-03-19 08:39:27,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:27,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1854267818] [2022-03-19 08:39:27,541 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:39:27,541 INFO L85 PathProgramCache]: Analyzing trace with hash 465518992, now seen corresponding path program 1 times [2022-03-19 08:39:27,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:27,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85386482] [2022-03-19 08:39:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:27,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:27,543 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:39:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:27,545 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:39:27,546 INFO L85 PathProgramCache]: Analyzing trace with hash 460692815, now seen corresponding path program 202 times [2022-03-19 08:39:27,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:27,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415018724] [2022-03-19 08:39:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:27,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:29,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:39:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:29,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:39:29,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415018724] [2022-03-19 08:39:29,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415018724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:39:29,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075910662] [2022-03-19 08:39:29,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:39:29,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:39:29,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:39:29,765 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:39:29,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-19 08:39:29,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:39:29,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:39:29,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-19 08:39:29,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:39:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:30,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:39:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:37,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075910662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:39:37,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:39:37,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 208 [2022-03-19 08:39:37,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:39:37,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1854267818] [2022-03-19 08:39:37,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1854267818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:39:37,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:39:37,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-19 08:39:37,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626371448] [2022-03-19 08:39:37,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:39:37,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-19 08:39:37,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-19 08:39:37,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21323, Invalid=21733, Unknown=0, NotChecked=0, Total=43056 [2022-03-19 08:39:37,625 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:39:40,306 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2022-03-19 08:39:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-19 08:39:40,307 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-03-19 08:39:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:39:40,319 INFO L225 Difference]: With dead ends: 226 [2022-03-19 08:39:40,319 INFO L226 Difference]: Without dead ends: 219 [2022-03-19 08:39:40,323 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5756 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=42438, Invalid=53352, Unknown=0, NotChecked=0, Total=95790 [2022-03-19 08:39:40,323 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:39:40,323 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 34 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:39:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-19 08:39:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-03-19 08:39:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.014018691588785) internal successors, (217), 214 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:40,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2022-03-19 08:39:40,329 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 215 [2022-03-19 08:39:40,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:39:40,329 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2022-03-19 08:39:40,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2022-03-19 08:39:40,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-03-19 08:39:40,330 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:39:40,330 INFO L500 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:39:40,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-19 08:39:40,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,SelfDestructingSolverStorable204,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:39:40,543 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:39:40,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:39:40,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2038419156, now seen corresponding path program 203 times [2022-03-19 08:39:40,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:40,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1815980580] [2022-03-19 08:39:40,744 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:39:40,745 INFO L85 PathProgramCache]: Analyzing trace with hash 524624336, now seen corresponding path program 1 times [2022-03-19 08:39:40,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:40,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971515157] [2022-03-19 08:39:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:40,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:40,747 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:39:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:40,750 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:39:40,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2038419156, now seen corresponding path program 204 times [2022-03-19 08:39:40,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:40,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785419758] [2022-03-19 08:39:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:40,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:43,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:39:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 103 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:43,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:39:43,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785419758] [2022-03-19 08:39:43,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785419758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:39:43,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010916315] [2022-03-19 08:39:43,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:39:43,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:39:43,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:39:43,909 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:39:43,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-19 08:39:43,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:39:43,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:39:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:39:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:39:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 306 proven. 1 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2022-03-19 08:39:44,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:39:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 306 proven. 1 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2022-03-19 08:39:44,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010916315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:39:44,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:39:44,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 4, 4] total 110 [2022-03-19 08:39:44,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:39:44,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1815980580] [2022-03-19 08:39:44,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1815980580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:39:44,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:39:44,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-03-19 08:39:44,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265035849] [2022-03-19 08:39:44,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:39:44,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-19 08:39:44,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:44,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-19 08:39:44,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-19 08:39:44,583 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:47,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:39:47,660 INFO L93 Difference]: Finished difference Result 228 states and 232 transitions. [2022-03-19 08:39:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-19 08:39:47,660 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-03-19 08:39:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:39:47,673 INFO L225 Difference]: With dead ends: 228 [2022-03-19 08:39:47,673 INFO L226 Difference]: Without dead ends: 221 [2022-03-19 08:39:47,675 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=17218, Invalid=27938, Unknown=0, NotChecked=0, Total=45156 [2022-03-19 08:39:47,675 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:39:47,675 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 44 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:39:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-19 08:39:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-03-19 08:39:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2022-03-19 08:39:47,687 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 217 [2022-03-19 08:39:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:39:47,687 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2022-03-19 08:39:47,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2022-03-19 08:39:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-19 08:39:47,689 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:39:47,689 INFO L500 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:39:47,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-19 08:39:47,905 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205,SelfDestructingSolverStorable206 [2022-03-19 08:39:47,905 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:39:47,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:39:47,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1496662473, now seen corresponding path program 205 times [2022-03-19 08:39:47,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:47,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1649011058] [2022-03-19 08:39:48,152 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:39:48,153 INFO L85 PathProgramCache]: Analyzing trace with hash 583729680, now seen corresponding path program 1 times [2022-03-19 08:39:48,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:48,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745335403] [2022-03-19 08:39:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:48,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:48,155 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:39:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:48,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:39:48,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1496662473, now seen corresponding path program 206 times [2022-03-19 08:39:48,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:48,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630900687] [2022-03-19 08:39:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:48,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:50,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:39:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:39:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:50,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:39:50,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630900687] [2022-03-19 08:39:50,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630900687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:39:50,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503358456] [2022-03-19 08:39:50,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:39:50,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:39:50,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:39:50,156 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:39:50,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-19 08:39:50,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:39:50,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:39:50,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-19 08:39:50,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:39:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:50,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:39:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:39:56,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503358456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:39:56,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:39:56,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 212 [2022-03-19 08:39:56,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:39:56,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1649011058] [2022-03-19 08:39:56,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1649011058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:39:56,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:39:56,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-19 08:39:56,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399849956] [2022-03-19 08:39:56,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:39:56,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-19 08:39:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-19 08:39:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2022-03-19 08:39:56,330 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:39:59,236 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2022-03-19 08:39:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-19 08:39:59,237 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-03-19 08:39:59,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:39:59,237 INFO L225 Difference]: With dead ends: 230 [2022-03-19 08:39:59,237 INFO L226 Difference]: Without dead ends: 223 [2022-03-19 08:39:59,243 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5973 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=44102, Invalid=55438, Unknown=0, NotChecked=0, Total=99540 [2022-03-19 08:39:59,243 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:39:59,243 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 39 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:39:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-19 08:39:59,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-03-19 08:39:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2022-03-19 08:39:59,249 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 219 [2022-03-19 08:39:59,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:39:59,249 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2022-03-19 08:39:59,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:39:59,249 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2022-03-19 08:39:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-19 08:39:59,250 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:39:59,250 INFO L500 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:39:59,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-19 08:39:59,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,SelfDestructingSolverStorable208,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:39:59,463 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:39:59,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:39:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1390976806, now seen corresponding path program 207 times [2022-03-19 08:39:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:39:59,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2119813383] [2022-03-19 08:39:59,685 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:39:59,686 INFO L85 PathProgramCache]: Analyzing trace with hash 642835024, now seen corresponding path program 1 times [2022-03-19 08:39:59,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:59,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842027124] [2022-03-19 08:39:59,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:59,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:59,690 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:39:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:39:59,707 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:39:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1390976806, now seen corresponding path program 208 times [2022-03-19 08:39:59,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:39:59,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699884141] [2022-03-19 08:39:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:39:59,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:39:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:02,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:40:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:02,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:40:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699884141] [2022-03-19 08:40:02,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699884141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:40:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136843200] [2022-03-19 08:40:02,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:40:02,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:40:02,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:40:02,236 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:40:02,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-19 08:40:02,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:40:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:40:02,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-19 08:40:02,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:40:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:02,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:40:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:08,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136843200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:40:08,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:40:08,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107, 107] total 214 [2022-03-19 08:40:08,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:40:08,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2119813383] [2022-03-19 08:40:08,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2119813383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:40:08,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:40:08,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-03-19 08:40:08,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852497192] [2022-03-19 08:40:08,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:40:08,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-19 08:40:08,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:40:08,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-19 08:40:08,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22580, Invalid=23002, Unknown=0, NotChecked=0, Total=45582 [2022-03-19 08:40:08,428 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:40:11,332 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2022-03-19 08:40:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-19 08:40:11,332 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-03-19 08:40:11,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:40:11,333 INFO L225 Difference]: With dead ends: 232 [2022-03-19 08:40:11,333 INFO L226 Difference]: Without dead ends: 225 [2022-03-19 08:40:11,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=44946, Invalid=56496, Unknown=0, NotChecked=0, Total=101442 [2022-03-19 08:40:11,337 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:40:11,337 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 44 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:40:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-19 08:40:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-03-19 08:40:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.0136363636363637) internal successors, (223), 220 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:11,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2022-03-19 08:40:11,343 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 221 [2022-03-19 08:40:11,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:40:11,343 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2022-03-19 08:40:11,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2022-03-19 08:40:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-03-19 08:40:11,344 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:40:11,344 INFO L500 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:40:11,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-19 08:40:11,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,SelfDestructingSolverStorable210,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:40:11,546 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:40:11,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:40:11,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1388701373, now seen corresponding path program 209 times [2022-03-19 08:40:11,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:40:11,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [830972505] [2022-03-19 08:40:11,754 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:40:11,755 INFO L85 PathProgramCache]: Analyzing trace with hash 701940368, now seen corresponding path program 1 times [2022-03-19 08:40:11,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:40:11,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323251938] [2022-03-19 08:40:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:40:11,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:40:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:40:11,757 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:40:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:40:11,758 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:40:11,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1388701373, now seen corresponding path program 210 times [2022-03-19 08:40:11,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:40:11,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026188333] [2022-03-19 08:40:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:40:11,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:40:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:13,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:40:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 106 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:13,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:40:13,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026188333] [2022-03-19 08:40:13,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026188333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:40:13,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667527235] [2022-03-19 08:40:13,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:40:13,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:40:13,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:40:13,811 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:40:13,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-19 08:40:13,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:40:13,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:40:13,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:40:13,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:40:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 315 proven. 1 refuted. 0 times theorem prover too weak. 10920 trivial. 0 not checked. [2022-03-19 08:40:14,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:40:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 315 proven. 1 refuted. 0 times theorem prover too weak. 10920 trivial. 0 not checked. [2022-03-19 08:40:14,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667527235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:40:14,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:40:14,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 4, 4] total 113 [2022-03-19 08:40:14,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:40:14,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [830972505] [2022-03-19 08:40:14,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [830972505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:40:14,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:40:14,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-19 08:40:14,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541255628] [2022-03-19 08:40:14,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:40:14,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-19 08:40:14,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:40:14,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-19 08:40:14,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-03-19 08:40:14,233 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:40:17,591 INFO L93 Difference]: Finished difference Result 234 states and 238 transitions. [2022-03-19 08:40:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-19 08:40:17,591 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-03-19 08:40:17,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:40:17,592 INFO L225 Difference]: With dead ends: 234 [2022-03-19 08:40:17,592 INFO L226 Difference]: Without dead ends: 227 [2022-03-19 08:40:17,594 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=18196, Invalid=29546, Unknown=0, NotChecked=0, Total=47742 [2022-03-19 08:40:17,594 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:40:17,594 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 44 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:40:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-19 08:40:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-19 08:40:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2022-03-19 08:40:17,601 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 223 [2022-03-19 08:40:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:40:17,601 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2022-03-19 08:40:17,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:17,602 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2022-03-19 08:40:17,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-03-19 08:40:17,602 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:40:17,602 INFO L500 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:40:17,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-19 08:40:17,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211,SelfDestructingSolverStorable212 [2022-03-19 08:40:17,806 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:40:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:40:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1189773280, now seen corresponding path program 211 times [2022-03-19 08:40:17,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:40:17,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180093132] [2022-03-19 08:40:18,051 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:40:18,051 INFO L85 PathProgramCache]: Analyzing trace with hash 761045712, now seen corresponding path program 1 times [2022-03-19 08:40:18,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:40:18,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966360675] [2022-03-19 08:40:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:40:18,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:40:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:40:18,053 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:40:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:40:18,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:40:18,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1189773280, now seen corresponding path program 212 times [2022-03-19 08:40:18,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:40:18,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055797018] [2022-03-19 08:40:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:40:18,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:40:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:20,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:40:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:20,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:40:20,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055797018] [2022-03-19 08:40:20,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055797018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:40:20,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081837920] [2022-03-19 08:40:20,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:40:20,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:40:20,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:40:20,086 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:40:20,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-19 08:40:20,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:40:20,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:40:20,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-19 08:40:20,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:40:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:20,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:40:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:27,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081837920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:40:27,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:40:27,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 109, 109] total 218 [2022-03-19 08:40:27,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:40:27,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180093132] [2022-03-19 08:40:27,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180093132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:40:27,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:40:27,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-03-19 08:40:27,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22832187] [2022-03-19 08:40:27,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:40:27,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-19 08:40:27,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:40:27,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-19 08:40:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23438, Invalid=23868, Unknown=0, NotChecked=0, Total=47306 [2022-03-19 08:40:27,316 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:40:30,889 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2022-03-19 08:40:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-19 08:40:30,889 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-03-19 08:40:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:40:30,890 INFO L225 Difference]: With dead ends: 236 [2022-03-19 08:40:30,890 INFO L226 Difference]: Without dead ends: 229 [2022-03-19 08:40:30,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6306 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=46658, Invalid=58642, Unknown=0, NotChecked=0, Total=105300 [2022-03-19 08:40:30,894 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:40:30,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 34 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:40:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-19 08:40:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-03-19 08:40:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0133928571428572) internal successors, (227), 224 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2022-03-19 08:40:30,904 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 225 [2022-03-19 08:40:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:40:30,904 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2022-03-19 08:40:30,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2022-03-19 08:40:30,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-03-19 08:40:30,905 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:40:30,905 INFO L500 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:40:30,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-19 08:40:31,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214,SelfDestructingSolverStorable213 [2022-03-19 08:40:31,119 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:40:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:40:31,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1001563069, now seen corresponding path program 213 times [2022-03-19 08:40:31,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:40:31,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2072231377] [2022-03-19 08:40:31,395 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:40:31,395 INFO L85 PathProgramCache]: Analyzing trace with hash 820151056, now seen corresponding path program 1 times [2022-03-19 08:40:31,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:40:31,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122596304] [2022-03-19 08:40:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:40:31,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:40:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:40:31,398 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:40:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:40:31,400 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:40:31,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1001563069, now seen corresponding path program 214 times [2022-03-19 08:40:31,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:40:31,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834805994] [2022-03-19 08:40:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:40:31,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:40:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:34,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:40:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:34,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:40:34,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834805994] [2022-03-19 08:40:34,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834805994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:40:34,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033444300] [2022-03-19 08:40:34,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:40:34,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:40:34,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:40:34,641 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:40:34,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-19 08:40:34,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:40:34,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:40:34,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-19 08:40:34,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:40:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:35,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:40:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:41,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033444300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:40:41,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:40:41,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110, 110] total 220 [2022-03-19 08:40:41,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:40:41,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2072231377] [2022-03-19 08:40:41,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2072231377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:40:41,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:40:41,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-03-19 08:40:41,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831321202] [2022-03-19 08:40:41,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:40:41,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-19 08:40:41,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:40:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-19 08:40:41,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23873, Invalid=24307, Unknown=0, NotChecked=0, Total=48180 [2022-03-19 08:40:41,863 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:45,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:40:45,421 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2022-03-19 08:40:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-19 08:40:45,421 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-03-19 08:40:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:40:45,421 INFO L225 Difference]: With dead ends: 238 [2022-03-19 08:40:45,421 INFO L226 Difference]: Without dead ends: 231 [2022-03-19 08:40:45,425 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6419 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=47526, Invalid=59730, Unknown=0, NotChecked=0, Total=107256 [2022-03-19 08:40:45,425 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:40:45,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 19 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:40:45,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-19 08:40:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-03-19 08:40:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:45,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2022-03-19 08:40:45,431 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 227 [2022-03-19 08:40:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:40:45,431 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2022-03-19 08:40:45,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2022-03-19 08:40:45,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-03-19 08:40:45,432 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:40:45,432 INFO L500 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:40:45,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-19 08:40:45,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,SelfDestructingSolverStorable216,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:40:45,647 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:40:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:40:45,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1953147878, now seen corresponding path program 215 times [2022-03-19 08:40:45,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:40:45,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1516289629] [2022-03-19 08:40:45,868 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:40:45,869 INFO L85 PathProgramCache]: Analyzing trace with hash 879256400, now seen corresponding path program 1 times [2022-03-19 08:40:45,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:40:45,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167809533] [2022-03-19 08:40:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:40:45,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:40:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:40:45,871 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:40:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:40:45,872 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:40:45,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1953147878, now seen corresponding path program 216 times [2022-03-19 08:40:45,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:40:45,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286516086] [2022-03-19 08:40:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:40:45,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:40:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:49,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:40:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 109 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:49,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:40:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286516086] [2022-03-19 08:40:49,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286516086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:40:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594331771] [2022-03-19 08:40:49,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:40:49,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:40:49,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:40:49,380 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:40:49,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-19 08:40:49,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:40:49,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:40:49,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:40:49,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:40:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 324 proven. 1 refuted. 0 times theorem prover too weak. 11556 trivial. 0 not checked. [2022-03-19 08:40:49,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:40:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 324 proven. 1 refuted. 0 times theorem prover too weak. 11556 trivial. 0 not checked. [2022-03-19 08:40:50,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594331771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:40:50,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:40:50,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 4, 4] total 116 [2022-03-19 08:40:50,115 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:40:50,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1516289629] [2022-03-19 08:40:50,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1516289629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:40:50,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:40:50,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-03-19 08:40:50,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693649759] [2022-03-19 08:40:50,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:40:50,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-03-19 08:40:50,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:40:50,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-03-19 08:40:50,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-19 08:40:50,118 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:40:53,172 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2022-03-19 08:40:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-19 08:40:53,173 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-03-19 08:40:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:40:53,173 INFO L225 Difference]: With dead ends: 240 [2022-03-19 08:40:53,173 INFO L226 Difference]: Without dead ends: 233 [2022-03-19 08:40:53,175 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=19201, Invalid=31199, Unknown=0, NotChecked=0, Total=50400 [2022-03-19 08:40:53,175 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:40:53,176 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 49 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:40:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-19 08:40:53,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-03-19 08:40:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2022-03-19 08:40:53,181 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 229 [2022-03-19 08:40:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:40:53,182 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2022-03-19 08:40:53,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:40:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2022-03-19 08:40:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-03-19 08:40:53,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:40:53,182 INFO L500 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:40:53,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-19 08:40:53,398 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,SelfDestructingSolverStorable217,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:40:53,398 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:40:53,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:40:53,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1837982007, now seen corresponding path program 217 times [2022-03-19 08:40:53,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:40:53,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1222886094] [2022-03-19 08:40:53,573 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:40:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash 938361744, now seen corresponding path program 1 times [2022-03-19 08:40:53,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:40:53,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77596602] [2022-03-19 08:40:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:40:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:40:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:40:53,576 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:40:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:40:53,582 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:40:53,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1837982007, now seen corresponding path program 218 times [2022-03-19 08:40:53,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:40:53,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534479700] [2022-03-19 08:40:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:40:53,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:40:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:56,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:40:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:40:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:56,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:40:56,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534479700] [2022-03-19 08:40:56,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534479700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:40:56,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991249276] [2022-03-19 08:40:56,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:40:56,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:40:56,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:40:56,523 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:40:56,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-19 08:40:56,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:40:56,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:40:56,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-19 08:40:56,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:40:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:40:56,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:41:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:04,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991249276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:41:04,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:41:04,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 224 [2022-03-19 08:41:04,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:41:04,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1222886094] [2022-03-19 08:41:04,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1222886094] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:41:04,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:41:04,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-03-19 08:41:04,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283686342] [2022-03-19 08:41:04,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:41:04,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-03-19 08:41:04,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:41:04,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-03-19 08:41:04,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24755, Invalid=25197, Unknown=0, NotChecked=0, Total=49952 [2022-03-19 08:41:04,874 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:41:08,555 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2022-03-19 08:41:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-19 08:41:08,555 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-03-19 08:41:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:41:08,556 INFO L225 Difference]: With dead ends: 242 [2022-03-19 08:41:08,556 INFO L226 Difference]: Without dead ends: 235 [2022-03-19 08:41:08,560 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6648 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=49286, Invalid=61936, Unknown=0, NotChecked=0, Total=111222 [2022-03-19 08:41:08,560 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:41:08,560 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 49 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:41:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-19 08:41:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-03-19 08:41:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2022-03-19 08:41:08,566 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 231 [2022-03-19 08:41:08,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:41:08,566 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2022-03-19 08:41:08,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:08,566 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2022-03-19 08:41:08,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-19 08:41:08,567 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:41:08,567 INFO L500 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:41:08,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-19 08:41:08,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220,SelfDestructingSolverStorable219 [2022-03-19 08:41:08,783 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:41:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:41:08,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1313432812, now seen corresponding path program 219 times [2022-03-19 08:41:08,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:41:08,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1502950977] [2022-03-19 08:41:08,944 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:41:08,945 INFO L85 PathProgramCache]: Analyzing trace with hash 997467088, now seen corresponding path program 1 times [2022-03-19 08:41:08,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:41:08,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262353085] [2022-03-19 08:41:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:41:08,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:41:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:41:08,947 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:41:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:41:08,949 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:41:08,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1313432812, now seen corresponding path program 220 times [2022-03-19 08:41:08,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:41:08,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475751278] [2022-03-19 08:41:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:41:08,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:41:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:41:11,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:41:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:41:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:11,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:41:11,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475751278] [2022-03-19 08:41:11,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475751278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:41:11,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190289553] [2022-03-19 08:41:11,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:41:11,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:41:11,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:41:11,874 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:41:11,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-19 08:41:11,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:41:11,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:41:11,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-19 08:41:11,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:41:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:12,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:41:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:20,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190289553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:41:20,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:41:20,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 113, 113] total 226 [2022-03-19 08:41:20,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:41:20,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1502950977] [2022-03-19 08:41:20,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1502950977] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:41:20,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:41:20,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-03-19 08:41:20,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893245118] [2022-03-19 08:41:20,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:41:20,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-19 08:41:20,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:41:20,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-19 08:41:20,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25202, Invalid=25648, Unknown=0, NotChecked=0, Total=50850 [2022-03-19 08:41:20,354 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:24,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:41:24,267 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2022-03-19 08:41:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-19 08:41:24,267 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-03-19 08:41:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:41:24,267 INFO L225 Difference]: With dead ends: 244 [2022-03-19 08:41:24,268 INFO L226 Difference]: Without dead ends: 237 [2022-03-19 08:41:24,272 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6764 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=50178, Invalid=63054, Unknown=0, NotChecked=0, Total=113232 [2022-03-19 08:41:24,273 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:41:24,273 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 49 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:41:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-19 08:41:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-03-19 08:41:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0129310344827587) internal successors, (235), 232 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 239 transitions. [2022-03-19 08:41:24,279 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 239 transitions. Word has length 233 [2022-03-19 08:41:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:41:24,279 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 239 transitions. [2022-03-19 08:41:24,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 239 transitions. [2022-03-19 08:41:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-03-19 08:41:24,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:41:24,280 INFO L500 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:41:24,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-19 08:41:24,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221,SelfDestructingSolverStorable222 [2022-03-19 08:41:24,497 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:41:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:41:24,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1871130191, now seen corresponding path program 221 times [2022-03-19 08:41:24,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:41:24,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [236710130] [2022-03-19 08:41:24,771 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:41:24,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1056572432, now seen corresponding path program 1 times [2022-03-19 08:41:24,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:41:24,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396011510] [2022-03-19 08:41:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:41:24,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:41:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:41:24,774 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:41:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:41:24,776 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:41:24,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1871130191, now seen corresponding path program 222 times [2022-03-19 08:41:24,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:41:24,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700572558] [2022-03-19 08:41:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:41:24,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:41:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:41:27,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:41:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:41:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:27,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:41:27,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700572558] [2022-03-19 08:41:27,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700572558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:41:27,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997785993] [2022-03-19 08:41:27,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:41:27,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:41:27,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:41:27,144 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:41:27,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-19 08:41:27,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:41:27,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:41:27,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:41:27,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:41:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 333 proven. 1 refuted. 0 times theorem prover too weak. 12210 trivial. 0 not checked. [2022-03-19 08:41:27,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:41:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 333 proven. 1 refuted. 0 times theorem prover too weak. 12210 trivial. 0 not checked. [2022-03-19 08:41:27,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997785993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:41:27,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:41:27,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 4, 4] total 119 [2022-03-19 08:41:27,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:41:27,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [236710130] [2022-03-19 08:41:27,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [236710130] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:41:27,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:41:27,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-03-19 08:41:27,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003593072] [2022-03-19 08:41:27,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:41:27,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-19 08:41:27,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:41:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-19 08:41:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-03-19 08:41:27,563 INFO L87 Difference]: Start difference. First operand 237 states and 239 transitions. Second operand has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:41:30,503 INFO L93 Difference]: Finished difference Result 246 states and 250 transitions. [2022-03-19 08:41:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-19 08:41:30,503 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-03-19 08:41:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:41:30,504 INFO L225 Difference]: With dead ends: 246 [2022-03-19 08:41:30,504 INFO L226 Difference]: Without dead ends: 239 [2022-03-19 08:41:30,506 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=20233, Invalid=32897, Unknown=0, NotChecked=0, Total=53130 [2022-03-19 08:41:30,506 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:41:30,506 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 64 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:41:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-19 08:41:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-03-19 08:41:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2022-03-19 08:41:30,513 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 235 [2022-03-19 08:41:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:41:30,513 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2022-03-19 08:41:30,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2022-03-19 08:41:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-03-19 08:41:30,514 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:41:30,514 INFO L500 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:41:30,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-19 08:41:30,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223,SelfDestructingSolverStorable224 [2022-03-19 08:41:30,728 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:41:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:41:30,728 INFO L85 PathProgramCache]: Analyzing trace with hash -947399410, now seen corresponding path program 223 times [2022-03-19 08:41:30,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:41:30,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1371958330] [2022-03-19 08:41:30,860 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:41:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1115677776, now seen corresponding path program 1 times [2022-03-19 08:41:30,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:41:30,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839419546] [2022-03-19 08:41:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:41:30,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:41:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:41:30,862 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:41:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:41:30,864 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:41:30,864 INFO L85 PathProgramCache]: Analyzing trace with hash -947399410, now seen corresponding path program 224 times [2022-03-19 08:41:30,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:41:30,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552810497] [2022-03-19 08:41:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:41:30,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:41:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:41:33,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:41:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:41:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:33,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:41:33,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552810497] [2022-03-19 08:41:33,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552810497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:41:33,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040479911] [2022-03-19 08:41:33,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:41:33,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:41:33,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:41:33,328 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:41:33,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-19 08:41:33,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:41:33,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:41:33,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 114 conjunts are in the unsatisfiable core [2022-03-19 08:41:33,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:41:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:33,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:41:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:40,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040479911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:41:40,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:41:40,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 115, 115] total 230 [2022-03-19 08:41:40,391 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:41:40,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1371958330] [2022-03-19 08:41:40,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1371958330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:41:40,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:41:40,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-03-19 08:41:40,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12478358] [2022-03-19 08:41:40,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:41:40,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-19 08:41:40,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:41:40,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-19 08:41:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26108, Invalid=26562, Unknown=0, NotChecked=0, Total=52670 [2022-03-19 08:41:40,396 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:41:43,480 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2022-03-19 08:41:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-19 08:41:43,480 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 237 [2022-03-19 08:41:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:41:43,481 INFO L225 Difference]: With dead ends: 248 [2022-03-19 08:41:43,481 INFO L226 Difference]: Without dead ends: 241 [2022-03-19 08:41:43,485 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6999 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=51986, Invalid=65320, Unknown=0, NotChecked=0, Total=117306 [2022-03-19 08:41:43,486 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:41:43,486 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 39 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:41:43,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-19 08:41:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-03-19 08:41:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2022-03-19 08:41:43,493 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2022-03-19 08:41:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:41:43,493 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2022-03-19 08:41:43,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2022-03-19 08:41:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-19 08:41:43,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:41:43,494 INFO L500 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:41:43,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-19 08:41:43,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225,SelfDestructingSolverStorable226 [2022-03-19 08:41:43,695 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:41:43,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:41:43,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1994618155, now seen corresponding path program 225 times [2022-03-19 08:41:43,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:41:43,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1659602232] [2022-03-19 08:41:43,924 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:41:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1174783120, now seen corresponding path program 1 times [2022-03-19 08:41:43,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:41:43,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850754257] [2022-03-19 08:41:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:41:43,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:41:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:41:43,927 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:41:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:41:43,928 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:41:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1994618155, now seen corresponding path program 226 times [2022-03-19 08:41:43,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:41:43,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314869779] [2022-03-19 08:41:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:41:43,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:41:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:41:46,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:41:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:41:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:46,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:41:46,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314869779] [2022-03-19 08:41:46,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314869779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:41:46,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814432883] [2022-03-19 08:41:46,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:41:46,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:41:46,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:41:46,419 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:41:46,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-19 08:41:46,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:41:46,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:41:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-19 08:41:46,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:41:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:46,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:41:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:53,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814432883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:41:53,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:41:53,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 116, 116] total 232 [2022-03-19 08:41:53,429 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:41:53,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1659602232] [2022-03-19 08:41:53,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1659602232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:41:53,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:41:53,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-03-19 08:41:53,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434958429] [2022-03-19 08:41:53,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:41:53,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-19 08:41:53,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:41:53,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-19 08:41:53,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26567, Invalid=27025, Unknown=0, NotChecked=0, Total=53592 [2022-03-19 08:41:53,434 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:41:56,600 INFO L93 Difference]: Finished difference Result 250 states and 254 transitions. [2022-03-19 08:41:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-19 08:41:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-03-19 08:41:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:41:56,601 INFO L225 Difference]: With dead ends: 250 [2022-03-19 08:41:56,601 INFO L226 Difference]: Without dead ends: 243 [2022-03-19 08:41:56,605 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7118 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=52902, Invalid=66468, Unknown=0, NotChecked=0, Total=119370 [2022-03-19 08:41:56,606 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:41:56,606 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 54 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:41:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-19 08:41:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-03-19 08:41:56,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0126050420168067) internal successors, (241), 238 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 245 transitions. [2022-03-19 08:41:56,613 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 245 transitions. Word has length 239 [2022-03-19 08:41:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:41:56,613 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 245 transitions. [2022-03-19 08:41:56,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:41:56,613 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 245 transitions. [2022-03-19 08:41:56,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-03-19 08:41:56,614 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:41:56,614 INFO L500 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:41:56,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-19 08:41:56,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,SelfDestructingSolverStorable228,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:41:56,832 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:41:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:41:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1109949944, now seen corresponding path program 227 times [2022-03-19 08:41:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:41:56,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2076326766] [2022-03-19 08:41:57,066 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:41:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1233888464, now seen corresponding path program 1 times [2022-03-19 08:41:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:41:57,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106145741] [2022-03-19 08:41:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:41:57,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:41:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:41:57,068 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:41:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:41:57,072 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:41:57,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1109949944, now seen corresponding path program 228 times [2022-03-19 08:41:57,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:41:57,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050461088] [2022-03-19 08:41:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:41:57,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:41:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:41:59,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:41:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:41:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 115 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:41:59,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:41:59,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050461088] [2022-03-19 08:41:59,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050461088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:41:59,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021289545] [2022-03-19 08:41:59,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:41:59,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:41:59,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:41:59,404 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:41:59,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-19 08:41:59,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:41:59,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:41:59,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:41:59,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:41:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 342 proven. 1 refuted. 0 times theorem prover too weak. 12882 trivial. 0 not checked. [2022-03-19 08:41:59,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:41:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 342 proven. 1 refuted. 0 times theorem prover too weak. 12882 trivial. 0 not checked. [2022-03-19 08:41:59,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021289545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:41:59,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:41:59,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 4, 4] total 122 [2022-03-19 08:41:59,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:41:59,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2076326766] [2022-03-19 08:41:59,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2076326766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:41:59,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:41:59,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-03-19 08:41:59,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329909] [2022-03-19 08:41:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:41:59,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-03-19 08:41:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:41:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-03-19 08:41:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-19 08:41:59,955 INFO L87 Difference]: Start difference. First operand 243 states and 245 transitions. Second operand has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:42:03,161 INFO L93 Difference]: Finished difference Result 252 states and 256 transitions. [2022-03-19 08:42:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-19 08:42:03,161 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-03-19 08:42:03,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:42:03,162 INFO L225 Difference]: With dead ends: 252 [2022-03-19 08:42:03,162 INFO L226 Difference]: Without dead ends: 245 [2022-03-19 08:42:03,164 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=21292, Invalid=34640, Unknown=0, NotChecked=0, Total=55932 [2022-03-19 08:42:03,165 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:42:03,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 39 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:42:03,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-19 08:42:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-03-19 08:42:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0125) internal successors, (243), 240 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:03,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2022-03-19 08:42:03,172 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 241 [2022-03-19 08:42:03,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:42:03,172 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2022-03-19 08:42:03,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2022-03-19 08:42:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-03-19 08:42:03,173 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:42:03,173 INFO L500 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:42:03,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-19 08:42:03,390 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,SelfDestructingSolverStorable229,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:42:03,391 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:42:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:42:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash 402377637, now seen corresponding path program 229 times [2022-03-19 08:42:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:42:03,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1450384421] [2022-03-19 08:42:03,533 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:42:03,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1292993808, now seen corresponding path program 1 times [2022-03-19 08:42:03,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:42:03,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338303871] [2022-03-19 08:42:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:42:03,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:42:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:42:03,536 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:42:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:42:03,538 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:42:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash 402377637, now seen corresponding path program 230 times [2022-03-19 08:42:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:42:03,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547088681] [2022-03-19 08:42:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:42:03,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:42:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:42:06,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:42:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:42:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 116 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:06,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:42:06,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547088681] [2022-03-19 08:42:06,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547088681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:42:06,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834922390] [2022-03-19 08:42:06,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:42:06,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:42:06,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:42:06,351 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:42:06,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-19 08:42:06,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:42:06,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:42:06,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-19 08:42:06,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:42:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 116 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:06,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:42:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 116 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:15,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834922390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:42:15,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:42:15,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 118, 118] total 236 [2022-03-19 08:42:15,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:42:15,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1450384421] [2022-03-19 08:42:15,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1450384421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:42:15,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:42:15,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-03-19 08:42:15,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752278264] [2022-03-19 08:42:15,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:42:15,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-03-19 08:42:15,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:42:15,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-03-19 08:42:15,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27497, Invalid=27963, Unknown=0, NotChecked=0, Total=55460 [2022-03-19 08:42:15,697 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 118 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:42:19,547 INFO L93 Difference]: Finished difference Result 254 states and 258 transitions. [2022-03-19 08:42:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-19 08:42:19,547 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 118 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-03-19 08:42:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:42:19,548 INFO L225 Difference]: With dead ends: 254 [2022-03-19 08:42:19,548 INFO L226 Difference]: Without dead ends: 247 [2022-03-19 08:42:19,552 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7359 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=54758, Invalid=68794, Unknown=0, NotChecked=0, Total=123552 [2022-03-19 08:42:19,553 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:42:19,553 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 29 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:42:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-19 08:42:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-03-19 08:42:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.012396694214876) internal successors, (245), 242 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2022-03-19 08:42:19,559 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 243 [2022-03-19 08:42:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:42:19,559 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2022-03-19 08:42:19,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 118 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:19,559 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2022-03-19 08:42:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-03-19 08:42:19,560 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:42:19,560 INFO L500 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:42:19,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-19 08:42:19,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-19 08:42:19,760 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:42:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:42:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2050236930, now seen corresponding path program 231 times [2022-03-19 08:42:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:42:19,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [492965633] [2022-03-19 08:42:19,947 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:42:19,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1352099152, now seen corresponding path program 1 times [2022-03-19 08:42:19,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:42:19,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647595805] [2022-03-19 08:42:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:42:19,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:42:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:42:19,949 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:42:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:42:19,950 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:42:19,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2050236930, now seen corresponding path program 232 times [2022-03-19 08:42:19,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:42:19,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846919911] [2022-03-19 08:42:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:42:19,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:42:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:42:22,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:42:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:42:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 117 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:22,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:42:22,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846919911] [2022-03-19 08:42:22,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846919911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:42:22,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793128693] [2022-03-19 08:42:22,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:42:22,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:42:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:42:22,601 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:42:22,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-19 08:42:22,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:42:22,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:42:22,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 118 conjunts are in the unsatisfiable core [2022-03-19 08:42:22,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:42:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 117 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:23,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:42:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 117 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:30,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793128693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:42:30,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:42:30,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 119, 119] total 238 [2022-03-19 08:42:30,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:42:30,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [492965633] [2022-03-19 08:42:30,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [492965633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:42:30,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:42:30,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-03-19 08:42:30,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544681638] [2022-03-19 08:42:30,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:42:30,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-03-19 08:42:30,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:42:30,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-03-19 08:42:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27968, Invalid=28438, Unknown=0, NotChecked=0, Total=56406 [2022-03-19 08:42:30,209 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 119 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:42:33,500 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2022-03-19 08:42:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-19 08:42:33,500 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 119 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-03-19 08:42:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:42:33,501 INFO L225 Difference]: With dead ends: 256 [2022-03-19 08:42:33,501 INFO L226 Difference]: Without dead ends: 249 [2022-03-19 08:42:33,505 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7481 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=55698, Invalid=69972, Unknown=0, NotChecked=0, Total=125670 [2022-03-19 08:42:33,506 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 125 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:42:33,506 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 49 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:42:33,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-19 08:42:33,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-03-19 08:42:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0122950819672132) internal successors, (247), 244 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2022-03-19 08:42:33,513 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 245 [2022-03-19 08:42:33,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:42:33,513 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2022-03-19 08:42:33,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 119 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:33,513 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2022-03-19 08:42:33,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-03-19 08:42:33,514 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:42:33,514 INFO L500 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:42:33,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-19 08:42:33,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233,SelfDestructingSolverStorable234 [2022-03-19 08:42:33,732 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:42:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:42:33,732 INFO L85 PathProgramCache]: Analyzing trace with hash 800085279, now seen corresponding path program 233 times [2022-03-19 08:42:33,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:42:33,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1242007904] [2022-03-19 08:42:33,916 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:42:33,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1411204496, now seen corresponding path program 1 times [2022-03-19 08:42:33,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:42:33,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607389905] [2022-03-19 08:42:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:42:33,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:42:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:42:33,919 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:42:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:42:33,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:42:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash 800085279, now seen corresponding path program 234 times [2022-03-19 08:42:33,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:42:33,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958251094] [2022-03-19 08:42:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:42:33,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:42:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:42:37,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:42:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:42:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 118 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:37,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:42:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958251094] [2022-03-19 08:42:37,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958251094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:42:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824578051] [2022-03-19 08:42:37,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:42:37,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:42:37,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:42:37,310 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:42:37,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-19 08:42:37,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:42:37,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:42:37,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:42:37,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:42:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 351 proven. 1 refuted. 0 times theorem prover too weak. 13572 trivial. 0 not checked. [2022-03-19 08:42:37,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:42:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 351 proven. 1 refuted. 0 times theorem prover too weak. 13572 trivial. 0 not checked. [2022-03-19 08:42:37,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824578051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:42:37,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:42:37,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 4, 4] total 125 [2022-03-19 08:42:37,740 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:42:37,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1242007904] [2022-03-19 08:42:37,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1242007904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:42:37,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:42:37,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-03-19 08:42:37,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481946282] [2022-03-19 08:42:37,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:42:37,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-03-19 08:42:37,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:42:37,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-03-19 08:42:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-03-19 08:42:37,743 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 120 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:42:40,960 INFO L93 Difference]: Finished difference Result 258 states and 262 transitions. [2022-03-19 08:42:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-03-19 08:42:40,961 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 120 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-03-19 08:42:40,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:42:40,961 INFO L225 Difference]: With dead ends: 258 [2022-03-19 08:42:40,961 INFO L226 Difference]: Without dead ends: 251 [2022-03-19 08:42:40,964 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=22378, Invalid=36428, Unknown=0, NotChecked=0, Total=58806 [2022-03-19 08:42:40,964 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:42:40,964 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 44 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:42:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-19 08:42:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-03-19 08:42:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.0121951219512195) internal successors, (249), 246 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2022-03-19 08:42:40,974 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 247 [2022-03-19 08:42:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:42:40,974 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2022-03-19 08:42:40,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 120 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2022-03-19 08:42:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-03-19 08:42:40,975 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:42:40,975 INFO L500 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:42:40,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-19 08:42:41,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-19 08:42:41,193 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:42:41,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:42:41,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1995191548, now seen corresponding path program 235 times [2022-03-19 08:42:41,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:42:41,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1396776646] [2022-03-19 08:42:41,430 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:42:41,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1470309840, now seen corresponding path program 1 times [2022-03-19 08:42:41,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:42:41,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066477301] [2022-03-19 08:42:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:42:41,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:42:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:42:41,432 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:42:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:42:41,434 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:42:41,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1995191548, now seen corresponding path program 236 times [2022-03-19 08:42:41,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:42:41,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093023788] [2022-03-19 08:42:41,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:42:41,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:42:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:42:44,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:42:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:42:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 119 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:44,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:42:44,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093023788] [2022-03-19 08:42:44,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093023788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:42:44,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938775609] [2022-03-19 08:42:44,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:42:44,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:42:44,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:42:44,201 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:42:44,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-19 08:42:44,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:42:44,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:42:44,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-19 08:42:44,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:42:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 119 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:44,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:42:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 119 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:52,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938775609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:42:52,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:42:52,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 121, 121] total 242 [2022-03-19 08:42:52,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:42:52,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1396776646] [2022-03-19 08:42:52,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1396776646] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:42:52,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:42:52,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-03-19 08:42:52,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108234468] [2022-03-19 08:42:52,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:42:52,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-03-19 08:42:52,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:42:52,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-03-19 08:42:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28922, Invalid=29400, Unknown=0, NotChecked=0, Total=58322 [2022-03-19 08:42:52,313 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 121 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:42:55,813 INFO L93 Difference]: Finished difference Result 260 states and 264 transitions. [2022-03-19 08:42:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-19 08:42:55,813 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 121 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-03-19 08:42:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:42:55,813 INFO L225 Difference]: With dead ends: 260 [2022-03-19 08:42:55,814 INFO L226 Difference]: Without dead ends: 253 [2022-03-19 08:42:55,818 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7728 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=57602, Invalid=72358, Unknown=0, NotChecked=0, Total=129960 [2022-03-19 08:42:55,818 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:42:55,818 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 59 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:42:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-19 08:42:55,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-03-19 08:42:55,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0120967741935485) internal successors, (251), 248 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:55,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2022-03-19 08:42:55,825 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 249 [2022-03-19 08:42:55,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:42:55,826 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2022-03-19 08:42:55,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 121 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:42:55,826 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2022-03-19 08:42:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-03-19 08:42:55,826 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:42:55,826 INFO L500 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:42:55,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-19 08:42:56,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237,SelfDestructingSolverStorable238 [2022-03-19 08:42:56,043 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:42:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:42:56,044 INFO L85 PathProgramCache]: Analyzing trace with hash -558919271, now seen corresponding path program 237 times [2022-03-19 08:42:56,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:42:56,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1621218289] [2022-03-19 08:42:56,229 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:42:56,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1529415184, now seen corresponding path program 1 times [2022-03-19 08:42:56,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:42:56,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348057370] [2022-03-19 08:42:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:42:56,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:42:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:42:56,231 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:42:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:42:56,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:42:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash -558919271, now seen corresponding path program 238 times [2022-03-19 08:42:56,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:42:56,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536956346] [2022-03-19 08:42:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:42:56,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:42:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:42:58,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:42:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:42:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 120 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:58,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:42:58,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536956346] [2022-03-19 08:42:58,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536956346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:42:58,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123239401] [2022-03-19 08:42:58,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:42:58,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:42:58,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:42:58,826 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:42:58,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-19 08:42:58,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:42:58,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:42:58,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 121 conjunts are in the unsatisfiable core [2022-03-19 08:42:58,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:42:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 120 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:42:59,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:43:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 120 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:43:07,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123239401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:43:07,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:43:07,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 122, 122] total 244 [2022-03-19 08:43:07,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:43:07,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1621218289] [2022-03-19 08:43:07,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1621218289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:43:07,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:43:07,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-03-19 08:43:07,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873853576] [2022-03-19 08:43:07,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:43:07,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-19 08:43:07,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:43:07,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-19 08:43:07,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29405, Invalid=29887, Unknown=0, NotChecked=0, Total=59292 [2022-03-19 08:43:07,372 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 122 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:10,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:43:10,980 INFO L93 Difference]: Finished difference Result 262 states and 266 transitions. [2022-03-19 08:43:10,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-19 08:43:10,980 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 122 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-03-19 08:43:10,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:43:10,981 INFO L225 Difference]: With dead ends: 262 [2022-03-19 08:43:10,981 INFO L226 Difference]: Without dead ends: 255 [2022-03-19 08:43:10,985 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7853 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=58566, Invalid=73566, Unknown=0, NotChecked=0, Total=132132 [2022-03-19 08:43:10,985 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:43:10,985 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 69 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:43:10,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-19 08:43:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-03-19 08:43:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.012) internal successors, (253), 250 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2022-03-19 08:43:10,993 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 251 [2022-03-19 08:43:10,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:43:10,993 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2022-03-19 08:43:10,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 122 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2022-03-19 08:43:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-03-19 08:43:10,993 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:43:10,993 INFO L500 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:43:11,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-19 08:43:11,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-03-19 08:43:11,212 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:43:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:43:11,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1661876982, now seen corresponding path program 239 times [2022-03-19 08:43:11,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:43:11,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [283386911] [2022-03-19 08:43:11,574 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:43:11,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1588520528, now seen corresponding path program 1 times [2022-03-19 08:43:11,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:43:11,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226472951] [2022-03-19 08:43:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:43:11,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:43:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:43:11,576 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:43:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:43:11,578 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:43:11,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1661876982, now seen corresponding path program 240 times [2022-03-19 08:43:11,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:43:11,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788544209] [2022-03-19 08:43:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:43:11,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:43:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:43:15,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:43:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:43:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 121 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:43:15,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:43:15,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788544209] [2022-03-19 08:43:15,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788544209] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:43:15,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868547069] [2022-03-19 08:43:15,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:43:15,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:43:15,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:43:15,107 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:43:15,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-19 08:43:15,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:43:15,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:43:15,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:43:15,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:43:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 360 proven. 1 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2022-03-19 08:43:15,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:43:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 360 proven. 1 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2022-03-19 08:43:15,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868547069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:43:15,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:43:15,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 4, 4] total 128 [2022-03-19 08:43:15,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:43:15,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [283386911] [2022-03-19 08:43:15,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [283386911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:43:15,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:43:15,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-03-19 08:43:15,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958189917] [2022-03-19 08:43:15,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:43:15,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-03-19 08:43:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:43:15,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-03-19 08:43:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-19 08:43:15,898 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 123 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:43:19,712 INFO L93 Difference]: Finished difference Result 264 states and 268 transitions. [2022-03-19 08:43:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-19 08:43:19,712 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 123 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-03-19 08:43:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:43:19,712 INFO L225 Difference]: With dead ends: 264 [2022-03-19 08:43:19,712 INFO L226 Difference]: Without dead ends: 257 [2022-03-19 08:43:19,715 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=23491, Invalid=38261, Unknown=0, NotChecked=0, Total=61752 [2022-03-19 08:43:19,715 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:43:19,715 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 29 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:43:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-19 08:43:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-03-19 08:43:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2022-03-19 08:43:19,721 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 253 [2022-03-19 08:43:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:43:19,721 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2022-03-19 08:43:19,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 123 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2022-03-19 08:43:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-03-19 08:43:19,722 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:43:19,722 INFO L500 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:43:19,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-19 08:43:19,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,SelfDestructingSolverStorable242,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:43:19,938 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:43:19,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:43:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1248330003, now seen corresponding path program 241 times [2022-03-19 08:43:19,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:43:19,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [916137636] [2022-03-19 08:43:20,154 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:43:20,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1647625872, now seen corresponding path program 1 times [2022-03-19 08:43:20,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:43:20,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325547432] [2022-03-19 08:43:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:43:20,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:43:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:43:20,156 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:43:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:43:20,158 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:43:20,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1248330003, now seen corresponding path program 242 times [2022-03-19 08:43:20,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:43:20,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688838704] [2022-03-19 08:43:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:43:20,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:43:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:43:23,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:43:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:43:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 122 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:43:23,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:43:23,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688838704] [2022-03-19 08:43:23,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688838704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:43:23,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768037591] [2022-03-19 08:43:23,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:43:23,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:43:23,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:43:23,883 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:43:23,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-19 08:43:23,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:43:23,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:43:23,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-19 08:43:23,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:43:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 122 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:43:24,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:43:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 122 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:43:33,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768037591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:43:33,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:43:33,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 124, 124] total 248 [2022-03-19 08:43:33,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:43:33,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [916137636] [2022-03-19 08:43:33,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [916137636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:43:33,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:43:33,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-03-19 08:43:33,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346911889] [2022-03-19 08:43:33,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:43:33,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-03-19 08:43:33,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:43:33,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-03-19 08:43:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30383, Invalid=30873, Unknown=0, NotChecked=0, Total=61256 [2022-03-19 08:43:33,638 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand has 125 states, 125 states have (on average 2.008) internal successors, (251), 124 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:43:37,802 INFO L93 Difference]: Finished difference Result 266 states and 270 transitions. [2022-03-19 08:43:37,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-19 08:43:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.008) internal successors, (251), 124 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-03-19 08:43:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:43:37,803 INFO L225 Difference]: With dead ends: 266 [2022-03-19 08:43:37,803 INFO L226 Difference]: Without dead ends: 259 [2022-03-19 08:43:37,808 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8106 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=60518, Invalid=76012, Unknown=0, NotChecked=0, Total=136530 [2022-03-19 08:43:37,808 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 08:43:37,808 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 34 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 08:43:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-19 08:43:37,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-03-19 08:43:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2022-03-19 08:43:37,814 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 255 [2022-03-19 08:43:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:43:37,815 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2022-03-19 08:43:37,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.008) internal successors, (251), 124 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:37,815 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2022-03-19 08:43:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-03-19 08:43:37,815 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:43:37,815 INFO L500 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:43:37,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-19 08:43:38,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243,SelfDestructingSolverStorable244 [2022-03-19 08:43:38,031 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:43:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:43:38,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1033325584, now seen corresponding path program 243 times [2022-03-19 08:43:38,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:43:38,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1683250880] [2022-03-19 08:43:38,251 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:43:38,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1706731216, now seen corresponding path program 1 times [2022-03-19 08:43:38,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:43:38,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534791113] [2022-03-19 08:43:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:43:38,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:43:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:43:38,253 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:43:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:43:38,254 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:43:38,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1033325584, now seen corresponding path program 244 times [2022-03-19 08:43:38,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:43:38,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446541603] [2022-03-19 08:43:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:43:38,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:43:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:43:41,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:43:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:43:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 123 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:43:41,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:43:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446541603] [2022-03-19 08:43:41,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446541603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:43:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188372264] [2022-03-19 08:43:41,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:43:41,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:43:41,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:43:41,972 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:43:41,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-19 08:43:42,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:43:42,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:43:42,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 124 conjunts are in the unsatisfiable core [2022-03-19 08:43:42,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:43:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 123 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:43:42,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:43:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 123 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:43:53,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188372264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:43:53,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:43:53,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 125, 125] total 250 [2022-03-19 08:43:53,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:43:53,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1683250880] [2022-03-19 08:43:53,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1683250880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:43:53,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:43:53,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-03-19 08:43:53,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460702624] [2022-03-19 08:43:53,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:43:53,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-03-19 08:43:53,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:43:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-03-19 08:43:53,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30878, Invalid=31372, Unknown=0, NotChecked=0, Total=62250 [2022-03-19 08:43:53,121 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 125 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:58,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:43:58,418 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2022-03-19 08:43:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-19 08:43:58,419 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 125 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-03-19 08:43:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:43:58,419 INFO L225 Difference]: With dead ends: 268 [2022-03-19 08:43:58,419 INFO L226 Difference]: Without dead ends: 261 [2022-03-19 08:43:58,426 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8234 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=61506, Invalid=77250, Unknown=0, NotChecked=0, Total=138756 [2022-03-19 08:43:58,426 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 131 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:43:58,426 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 44 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:43:58,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-19 08:43:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-03-19 08:43:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.01171875) internal successors, (259), 256 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2022-03-19 08:43:58,433 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 257 [2022-03-19 08:43:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:43:58,433 INFO L478 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2022-03-19 08:43:58,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 125 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:43:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2022-03-19 08:43:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-03-19 08:43:58,434 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:43:58,434 INFO L500 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:43:58,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-19 08:43:58,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,SelfDestructingSolverStorable246,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:43:58,647 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:43:58,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:43:58,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1023943565, now seen corresponding path program 245 times [2022-03-19 08:43:58,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:43:58,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1243898477] [2022-03-19 08:43:58,839 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:43:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1765836560, now seen corresponding path program 1 times [2022-03-19 08:43:58,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:43:58,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778202247] [2022-03-19 08:43:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:43:58,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:43:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:43:58,842 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:43:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:43:58,844 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:43:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1023943565, now seen corresponding path program 246 times [2022-03-19 08:43:58,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:43:58,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135428459] [2022-03-19 08:43:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:43:58,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:43:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:44:01,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:44:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:44:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 124 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:44:01,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:44:01,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135428459] [2022-03-19 08:44:01,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135428459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:44:01,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786703371] [2022-03-19 08:44:01,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:44:01,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:44:01,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:44:01,936 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:44:01,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-19 08:44:01,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:44:01,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:44:01,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:44:01,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:44:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 369 proven. 1 refuted. 0 times theorem prover too weak. 15006 trivial. 0 not checked. [2022-03-19 08:44:02,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:44:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 369 proven. 1 refuted. 0 times theorem prover too weak. 15006 trivial. 0 not checked. [2022-03-19 08:44:02,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786703371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:44:02,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:44:02,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 4, 4] total 131 [2022-03-19 08:44:02,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:44:02,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1243898477] [2022-03-19 08:44:02,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1243898477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:44:02,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:44:02,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-03-19 08:44:02,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724358645] [2022-03-19 08:44:02,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:44:02,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-03-19 08:44:02,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:44:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-03-19 08:44:02,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-03-19 08:44:02,391 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 126 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:44:06,252 INFO L93 Difference]: Finished difference Result 270 states and 274 transitions. [2022-03-19 08:44:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-19 08:44:06,252 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 126 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-03-19 08:44:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:44:06,253 INFO L225 Difference]: With dead ends: 270 [2022-03-19 08:44:06,253 INFO L226 Difference]: Without dead ends: 263 [2022-03-19 08:44:06,255 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=24631, Invalid=40139, Unknown=0, NotChecked=0, Total=64770 [2022-03-19 08:44:06,255 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:44:06,255 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 34 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:44:06,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-19 08:44:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-03-19 08:44:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2022-03-19 08:44:06,261 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 259 [2022-03-19 08:44:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:44:06,262 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2022-03-19 08:44:06,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 126 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2022-03-19 08:44:06,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-03-19 08:44:06,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:44:06,262 INFO L500 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:44:06,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-19 08:44:06,478 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,SelfDestructingSolverStorable248,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:44:06,479 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:44:06,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:44:06,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1920327702, now seen corresponding path program 247 times [2022-03-19 08:44:06,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:44:06,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752627287] [2022-03-19 08:44:06,866 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:44:06,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1824941904, now seen corresponding path program 1 times [2022-03-19 08:44:06,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:44:06,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348558869] [2022-03-19 08:44:06,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:44:06,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:44:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:44:06,869 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:44:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:44:06,871 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:44:06,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1920327702, now seen corresponding path program 248 times [2022-03-19 08:44:06,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:44:06,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714251608] [2022-03-19 08:44:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:44:06,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:44:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:44:09,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:44:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:44:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 125 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:44:09,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:44:09,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714251608] [2022-03-19 08:44:09,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714251608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:44:09,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442541998] [2022-03-19 08:44:09,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:44:09,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:44:09,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:44:09,995 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:44:09,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-19 08:44:10,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:44:10,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:44:10,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 126 conjunts are in the unsatisfiable core [2022-03-19 08:44:10,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:44:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 125 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:44:10,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:44:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 125 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:44:19,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442541998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:44:19,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:44:19,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 127, 127] total 254 [2022-03-19 08:44:19,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:44:19,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752627287] [2022-03-19 08:44:19,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752627287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:44:19,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:44:19,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-03-19 08:44:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988932542] [2022-03-19 08:44:19,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:44:19,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-03-19 08:44:19,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:44:19,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-03-19 08:44:19,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31880, Invalid=32382, Unknown=0, NotChecked=0, Total=64262 [2022-03-19 08:44:19,009 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 127 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:23,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:44:23,429 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2022-03-19 08:44:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-19 08:44:23,429 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 127 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2022-03-19 08:44:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:44:23,429 INFO L225 Difference]: With dead ends: 272 [2022-03-19 08:44:23,429 INFO L226 Difference]: Without dead ends: 265 [2022-03-19 08:44:23,434 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8493 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=63506, Invalid=79756, Unknown=0, NotChecked=0, Total=143262 [2022-03-19 08:44:23,435 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:44:23,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 49 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:44:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-19 08:44:23,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-03-19 08:44:23,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0115384615384615) internal successors, (263), 260 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2022-03-19 08:44:23,442 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 261 [2022-03-19 08:44:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:44:23,442 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2022-03-19 08:44:23,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 127 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2022-03-19 08:44:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-03-19 08:44:23,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:44:23,443 INFO L500 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:44:23,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-19 08:44:23,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-19 08:44:23,662 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:44:23,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:44:23,662 INFO L85 PathProgramCache]: Analyzing trace with hash -981567225, now seen corresponding path program 249 times [2022-03-19 08:44:23,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:44:23,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1252767576] [2022-03-19 08:44:23,920 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:44:23,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1884047248, now seen corresponding path program 1 times [2022-03-19 08:44:23,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:44:23,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48909705] [2022-03-19 08:44:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:44:23,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:44:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:44:23,924 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:44:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:44:23,925 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:44:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash -981567225, now seen corresponding path program 250 times [2022-03-19 08:44:23,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:44:23,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258541175] [2022-03-19 08:44:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:44:23,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:44:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:44:26,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:44:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:44:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 126 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:44:26,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:44:26,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258541175] [2022-03-19 08:44:26,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258541175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:44:26,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407244350] [2022-03-19 08:44:26,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:44:26,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:44:26,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:44:26,869 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:44:26,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-19 08:44:26,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:44:26,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:44:26,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-19 08:44:26,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:44:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 126 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:44:27,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:44:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 126 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:44:36,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407244350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:44:36,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:44:36,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 128, 128] total 256 [2022-03-19 08:44:36,898 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:44:36,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1252767576] [2022-03-19 08:44:36,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1252767576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:44:36,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:44:36,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-03-19 08:44:36,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664257874] [2022-03-19 08:44:36,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:44:36,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-19 08:44:36,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:44:36,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-19 08:44:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32387, Invalid=32893, Unknown=0, NotChecked=0, Total=65280 [2022-03-19 08:44:36,909 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 128 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:44:41,158 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2022-03-19 08:44:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-19 08:44:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 128 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-03-19 08:44:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:44:41,160 INFO L225 Difference]: With dead ends: 274 [2022-03-19 08:44:41,160 INFO L226 Difference]: Without dead ends: 267 [2022-03-19 08:44:41,164 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8624 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=64518, Invalid=81024, Unknown=0, NotChecked=0, Total=145542 [2022-03-19 08:44:41,165 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 08:44:41,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 39 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 08:44:41,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-19 08:44:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2022-03-19 08:44:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0114503816793894) internal successors, (265), 262 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2022-03-19 08:44:41,175 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 263 [2022-03-19 08:44:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:44:41,176 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2022-03-19 08:44:41,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 128 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2022-03-19 08:44:41,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-03-19 08:44:41,176 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:44:41,177 INFO L500 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:44:41,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-19 08:44:41,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,SelfDestructingSolverStorable252,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:44:41,393 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:44:41,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:44:41,394 INFO L85 PathProgramCache]: Analyzing trace with hash -775880988, now seen corresponding path program 251 times [2022-03-19 08:44:41,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:44:41,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1933150290] [2022-03-19 08:44:41,579 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:44:41,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1943152592, now seen corresponding path program 1 times [2022-03-19 08:44:41,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:44:41,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452333036] [2022-03-19 08:44:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:44:41,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:44:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:44:41,582 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:44:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:44:41,583 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:44:41,583 INFO L85 PathProgramCache]: Analyzing trace with hash -775880988, now seen corresponding path program 252 times [2022-03-19 08:44:41,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:44:41,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824075303] [2022-03-19 08:44:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:44:41,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:44:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:44:44,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:44:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:44:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 127 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:44:44,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:44:44,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824075303] [2022-03-19 08:44:44,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824075303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:44:44,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004152502] [2022-03-19 08:44:44,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:44:44,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:44:44,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:44:44,726 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:44:44,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-19 08:44:44,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:44:44,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:44:44,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:44:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:44:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 378 proven. 1 refuted. 0 times theorem prover too weak. 15750 trivial. 0 not checked. [2022-03-19 08:44:44,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:44:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 378 proven. 1 refuted. 0 times theorem prover too weak. 15750 trivial. 0 not checked. [2022-03-19 08:44:45,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004152502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:44:45,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:44:45,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 4, 4] total 134 [2022-03-19 08:44:45,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:44:45,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1933150290] [2022-03-19 08:44:45,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1933150290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:44:45,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:44:45,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-03-19 08:44:45,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820760695] [2022-03-19 08:44:45,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:44:45,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-03-19 08:44:45,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:44:45,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-03-19 08:44:45,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-19 08:44:45,205 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 129 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:44:49,291 INFO L93 Difference]: Finished difference Result 276 states and 280 transitions. [2022-03-19 08:44:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-19 08:44:49,291 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 129 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-03-19 08:44:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:44:49,292 INFO L225 Difference]: With dead ends: 276 [2022-03-19 08:44:49,292 INFO L226 Difference]: Without dead ends: 269 [2022-03-19 08:44:49,295 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=25798, Invalid=42062, Unknown=0, NotChecked=0, Total=67860 [2022-03-19 08:44:49,295 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:44:49,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 54 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:44:49,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-19 08:44:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-03-19 08:44:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.0113636363636365) internal successors, (267), 264 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 271 transitions. [2022-03-19 08:44:49,302 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 271 transitions. Word has length 265 [2022-03-19 08:44:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:44:49,302 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 271 transitions. [2022-03-19 08:44:49,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 129 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:44:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 271 transitions. [2022-03-19 08:44:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-03-19 08:44:49,303 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:44:49,303 INFO L500 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:44:49,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-19 08:44:49,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-19 08:44:49,517 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:44:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:44:49,518 INFO L85 PathProgramCache]: Analyzing trace with hash -679902847, now seen corresponding path program 253 times [2022-03-19 08:44:49,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:44:49,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2048768766] [2022-03-19 08:44:49,761 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:44:49,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2002257936, now seen corresponding path program 1 times [2022-03-19 08:44:49,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:44:49,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782340705] [2022-03-19 08:44:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:44:49,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:44:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:44:49,763 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:44:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:44:49,765 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:44:49,765 INFO L85 PathProgramCache]: Analyzing trace with hash -679902847, now seen corresponding path program 254 times [2022-03-19 08:44:49,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:44:49,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186438898] [2022-03-19 08:44:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:44:49,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:44:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:44:52,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:44:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:44:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 128 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:44:52,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:44:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186438898] [2022-03-19 08:44:52,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186438898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:44:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712405892] [2022-03-19 08:44:52,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:44:52,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:44:52,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:44:52,669 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:44:52,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-19 08:44:52,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:44:52,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:44:52,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-19 08:44:52,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:44:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 128 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:44:52,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:45:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 128 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:45:01,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712405892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:45:01,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:45:01,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 130, 130] total 260 [2022-03-19 08:45:01,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:45:01,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2048768766] [2022-03-19 08:45:01,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2048768766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:45:01,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:45:01,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-03-19 08:45:01,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886332853] [2022-03-19 08:45:01,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:45:01,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-03-19 08:45:01,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:45:01,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-03-19 08:45:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33413, Invalid=33927, Unknown=0, NotChecked=0, Total=67340 [2022-03-19 08:45:01,655 INFO L87 Difference]: Start difference. First operand 269 states and 271 transitions. Second operand has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 130 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:45:05,811 INFO L93 Difference]: Finished difference Result 278 states and 282 transitions. [2022-03-19 08:45:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-19 08:45:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 130 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-03-19 08:45:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:45:05,812 INFO L225 Difference]: With dead ends: 278 [2022-03-19 08:45:05,812 INFO L226 Difference]: Without dead ends: 271 [2022-03-19 08:45:05,817 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8889 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=66566, Invalid=83590, Unknown=0, NotChecked=0, Total=150156 [2022-03-19 08:45:05,818 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:45:05,818 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 34 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:45:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-03-19 08:45:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-03-19 08:45:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2022-03-19 08:45:05,825 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 267 [2022-03-19 08:45:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:45:05,825 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2022-03-19 08:45:05,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 130 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2022-03-19 08:45:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-03-19 08:45:05,826 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:45:05,826 INFO L500 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:45:05,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-19 08:45:06,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-03-19 08:45:06,044 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:45:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:45:06,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1360777438, now seen corresponding path program 255 times [2022-03-19 08:45:06,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:45:06,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [556719105] [2022-03-19 08:45:06,319 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:45:06,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2061363280, now seen corresponding path program 1 times [2022-03-19 08:45:06,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:45:06,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221068373] [2022-03-19 08:45:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:45:06,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:45:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:45:06,323 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:45:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:45:06,328 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:45:06,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1360777438, now seen corresponding path program 256 times [2022-03-19 08:45:06,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:45:06,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376578291] [2022-03-19 08:45:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:45:06,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:45:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:45:09,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:45:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:45:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:45:09,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:45:09,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376578291] [2022-03-19 08:45:09,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376578291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:45:09,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705315440] [2022-03-19 08:45:09,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:45:09,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:45:09,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:45:09,952 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:45:09,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-19 08:45:10,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:45:10,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:45:10,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 130 conjunts are in the unsatisfiable core [2022-03-19 08:45:10,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:45:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:45:10,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:45:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:45:19,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705315440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:45:19,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:45:19,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 131, 131] total 262 [2022-03-19 08:45:19,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:45:19,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [556719105] [2022-03-19 08:45:19,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [556719105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:45:19,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:45:19,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-03-19 08:45:19,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476940368] [2022-03-19 08:45:19,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:45:19,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-03-19 08:45:19,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:45:19,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-03-19 08:45:19,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33932, Invalid=34450, Unknown=0, NotChecked=0, Total=68382 [2022-03-19 08:45:19,954 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 131 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:45:24,245 INFO L93 Difference]: Finished difference Result 280 states and 284 transitions. [2022-03-19 08:45:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-19 08:45:24,245 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 131 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-03-19 08:45:24,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:45:24,246 INFO L225 Difference]: With dead ends: 280 [2022-03-19 08:45:24,246 INFO L226 Difference]: Without dead ends: 273 [2022-03-19 08:45:24,253 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=67602, Invalid=84888, Unknown=0, NotChecked=0, Total=152490 [2022-03-19 08:45:24,253 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:45:24,253 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 39 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:45:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-19 08:45:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2022-03-19 08:45:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.0111940298507462) internal successors, (271), 268 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2022-03-19 08:45:24,260 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 269 [2022-03-19 08:45:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:45:24,260 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2022-03-19 08:45:24,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.007575757575758) internal successors, (265), 131 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2022-03-19 08:45:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-03-19 08:45:24,261 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:45:24,261 INFO L500 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:45:24,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-19 08:45:24,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258,SelfDestructingSolverStorable257 [2022-03-19 08:45:24,476 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:45:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:45:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash -345522949, now seen corresponding path program 257 times [2022-03-19 08:45:24,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:45:24,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1772283085] [2022-03-19 08:45:24,649 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:45:24,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2120468624, now seen corresponding path program 1 times [2022-03-19 08:45:24,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:45:24,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605416349] [2022-03-19 08:45:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:45:24,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:45:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:45:24,651 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:45:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:45:24,654 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:45:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash -345522949, now seen corresponding path program 258 times [2022-03-19 08:45:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:45:24,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658544710] [2022-03-19 08:45:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:45:24,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:45:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:45:27,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:45:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:45:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 130 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:45:27,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:45:27,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658544710] [2022-03-19 08:45:27,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658544710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:45:27,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034590614] [2022-03-19 08:45:27,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:45:27,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:45:27,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:45:27,576 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:45:27,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-19 08:45:27,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:45:27,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:45:27,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:45:27,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:45:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 387 proven. 1 refuted. 0 times theorem prover too weak. 16512 trivial. 0 not checked. [2022-03-19 08:45:27,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:45:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 387 proven. 1 refuted. 0 times theorem prover too weak. 16512 trivial. 0 not checked. [2022-03-19 08:45:28,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034590614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:45:28,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:45:28,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 4, 4] total 137 [2022-03-19 08:45:28,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:45:28,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1772283085] [2022-03-19 08:45:28,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1772283085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:45:28,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:45:28,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-03-19 08:45:28,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428582531] [2022-03-19 08:45:28,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:45:28,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-03-19 08:45:28,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:45:28,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-03-19 08:45:28,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-03-19 08:45:28,024 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 132 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:32,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:45:32,523 INFO L93 Difference]: Finished difference Result 282 states and 286 transitions. [2022-03-19 08:45:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-03-19 08:45:32,523 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 132 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-03-19 08:45:32,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:45:32,524 INFO L225 Difference]: With dead ends: 282 [2022-03-19 08:45:32,524 INFO L226 Difference]: Without dead ends: 275 [2022-03-19 08:45:32,526 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=26992, Invalid=44030, Unknown=0, NotChecked=0, Total=71022 [2022-03-19 08:45:32,527 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:45:32,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 34 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:45:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-19 08:45:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-03-19 08:45:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.011111111111111) internal successors, (273), 270 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 277 transitions. [2022-03-19 08:45:32,533 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 277 transitions. Word has length 271 [2022-03-19 08:45:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:45:32,534 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 277 transitions. [2022-03-19 08:45:32,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.007518796992481) internal successors, (267), 132 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 277 transitions. [2022-03-19 08:45:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-03-19 08:45:32,534 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:45:32,534 INFO L500 BasicCegarLoop]: trace histogram [131, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:45:32,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-19 08:45:32,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260,SelfDestructingSolverStorable259 [2022-03-19 08:45:32,751 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:45:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:45:32,751 INFO L85 PathProgramCache]: Analyzing trace with hash 577312216, now seen corresponding path program 259 times [2022-03-19 08:45:32,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:45:32,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015914323] [2022-03-19 08:45:33,004 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:45:33,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2115393328, now seen corresponding path program 1 times [2022-03-19 08:45:33,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:45:33,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617547596] [2022-03-19 08:45:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:45:33,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:45:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:45:33,006 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:45:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:45:33,007 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:45:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash 577312216, now seen corresponding path program 260 times [2022-03-19 08:45:33,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:45:33,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736182069] [2022-03-19 08:45:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:45:33,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:45:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:45:35,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:45:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:45:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 131 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:45:35,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:45:35,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736182069] [2022-03-19 08:45:35,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736182069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:45:35,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806779010] [2022-03-19 08:45:35,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:45:35,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:45:35,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:45:35,948 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:45:35,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-19 08:45:36,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:45:36,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:45:36,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 132 conjunts are in the unsatisfiable core [2022-03-19 08:45:36,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:45:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 131 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:45:36,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:45:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 131 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:45:47,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806779010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:45:47,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:45:47,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 133, 133] total 266 [2022-03-19 08:45:47,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:45:47,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015914323] [2022-03-19 08:45:47,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015914323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:45:47,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:45:47,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-03-19 08:45:47,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072549843] [2022-03-19 08:45:47,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:45:47,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-19 08:45:47,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:45:47,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-19 08:45:47,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34982, Invalid=35508, Unknown=0, NotChecked=0, Total=70490 [2022-03-19 08:45:47,939 INFO L87 Difference]: Start difference. First operand 275 states and 277 transitions. Second operand has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 133 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:45:52,596 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2022-03-19 08:45:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-19 08:45:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 133 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2022-03-19 08:45:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:45:52,597 INFO L225 Difference]: With dead ends: 284 [2022-03-19 08:45:52,597 INFO L226 Difference]: Without dead ends: 277 [2022-03-19 08:45:52,603 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9294 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=69698, Invalid=87514, Unknown=0, NotChecked=0, Total=157212 [2022-03-19 08:45:52,603 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 139 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 08:45:52,603 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 49 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 08:45:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-19 08:45:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-03-19 08:45:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0110294117647058) internal successors, (275), 272 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 279 transitions. [2022-03-19 08:45:52,613 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 279 transitions. Word has length 273 [2022-03-19 08:45:52,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:45:52,613 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 279 transitions. [2022-03-19 08:45:52,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0074626865671643) internal successors, (269), 133 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:45:52,614 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 279 transitions. [2022-03-19 08:45:52,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-19 08:45:52,614 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:45:52,614 INFO L500 BasicCegarLoop]: trace histogram [132, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:45:52,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-19 08:45:52,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,SelfDestructingSolverStorable262,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:45:52,831 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:45:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:45:52,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1636324491, now seen corresponding path program 261 times [2022-03-19 08:45:52,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:45:52,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180654437] [2022-03-19 08:45:53,098 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:45:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2056287984, now seen corresponding path program 1 times [2022-03-19 08:45:53,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:45:53,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078485164] [2022-03-19 08:45:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:45:53,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:45:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:45:53,101 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:45:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:45:53,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:45:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1636324491, now seen corresponding path program 262 times [2022-03-19 08:45:53,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:45:53,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523783809] [2022-03-19 08:45:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:45:53,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:45:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:45:56,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:45:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:45:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 132 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:45:56,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:45:56,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523783809] [2022-03-19 08:45:56,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523783809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:45:56,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585629916] [2022-03-19 08:45:56,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:45:56,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:45:56,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:45:56,513 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:45:56,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-19 08:45:56,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:45:56,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:45:56,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 133 conjunts are in the unsatisfiable core [2022-03-19 08:45:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:45:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 132 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:45:57,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:46:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 132 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:46:08,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585629916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:46:08,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:46:08,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 134, 134] total 268 [2022-03-19 08:46:08,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:46:08,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180654437] [2022-03-19 08:46:08,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180654437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:46:08,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:46:08,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-03-19 08:46:08,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168754248] [2022-03-19 08:46:08,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:46:08,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-19 08:46:08,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:46:08,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-19 08:46:08,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35513, Invalid=36043, Unknown=0, NotChecked=0, Total=71556 [2022-03-19 08:46:08,601 INFO L87 Difference]: Start difference. First operand 277 states and 279 transitions. Second operand has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 134 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:46:13,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:46:13,246 INFO L93 Difference]: Finished difference Result 286 states and 290 transitions. [2022-03-19 08:46:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-03-19 08:46:13,246 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 134 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-03-19 08:46:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:46:13,247 INFO L225 Difference]: With dead ends: 286 [2022-03-19 08:46:13,247 INFO L226 Difference]: Without dead ends: 279 [2022-03-19 08:46:13,253 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9431 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=70758, Invalid=88842, Unknown=0, NotChecked=0, Total=159600 [2022-03-19 08:46:13,253 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 140 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 08:46:13,254 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 29 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 08:46:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-19 08:46:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2022-03-19 08:46:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.010948905109489) internal successors, (277), 274 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:46:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 281 transitions. [2022-03-19 08:46:13,261 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 281 transitions. Word has length 275 [2022-03-19 08:46:13,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:46:13,261 INFO L478 AbstractCegarLoop]: Abstraction has 279 states and 281 transitions. [2022-03-19 08:46:13,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 134 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:46:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 281 transitions. [2022-03-19 08:46:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-03-19 08:46:13,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:46:13,262 INFO L500 BasicCegarLoop]: trace histogram [133, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:46:13,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-19 08:46:13,478 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,SelfDestructingSolverStorable264,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:46:13,478 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:46:13,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:46:13,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1362578898, now seen corresponding path program 263 times [2022-03-19 08:46:13,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:46:13,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1439002807] [2022-03-19 08:46:13,690 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:46:13,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1997182640, now seen corresponding path program 1 times [2022-03-19 08:46:13,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:46:13,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140622561] [2022-03-19 08:46:13,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:46:13,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:46:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:46:13,692 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:46:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:46:13,694 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:46:13,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1362578898, now seen corresponding path program 264 times [2022-03-19 08:46:13,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:46:13,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348687866] [2022-03-19 08:46:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:46:13,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:46:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:46:17,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:46:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:46:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 133 proven. 17556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:46:17,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:46:17,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348687866] [2022-03-19 08:46:17,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348687866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:46:17,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946810055] [2022-03-19 08:46:17,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:46:17,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:46:17,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:46:17,224 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:46:17,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-19 08:46:17,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:46:17,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:46:17,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:46:17,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:46:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 396 proven. 1 refuted. 0 times theorem prover too weak. 17292 trivial. 0 not checked. [2022-03-19 08:46:17,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:46:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 396 proven. 1 refuted. 0 times theorem prover too weak. 17292 trivial. 0 not checked. [2022-03-19 08:46:17,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946810055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:46:17,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:46:17,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 4, 4] total 140 [2022-03-19 08:46:17,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:46:17,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1439002807] [2022-03-19 08:46:17,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1439002807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:46:17,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:46:17,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-03-19 08:46:17,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106421233] [2022-03-19 08:46:17,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:46:17,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-03-19 08:46:17,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:46:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-03-19 08:46:17,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-19 08:46:17,811 INFO L87 Difference]: Start difference. First operand 279 states and 281 transitions. Second operand has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 135 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:46:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:46:23,267 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2022-03-19 08:46:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-19 08:46:23,267 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 135 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-03-19 08:46:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:46:23,268 INFO L225 Difference]: With dead ends: 288 [2022-03-19 08:46:23,268 INFO L226 Difference]: Without dead ends: 281 [2022-03-19 08:46:23,271 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=28213, Invalid=46043, Unknown=0, NotChecked=0, Total=74256 [2022-03-19 08:46:23,271 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 08:46:23,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 29 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 08:46:23,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-19 08:46:23,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-03-19 08:46:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0108695652173914) internal successors, (279), 276 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:46:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2022-03-19 08:46:23,278 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 277 [2022-03-19 08:46:23,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:46:23,279 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2022-03-19 08:46:23,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0073529411764706) internal successors, (273), 135 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:46:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2022-03-19 08:46:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-03-19 08:46:23,279 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:46:23,279 INFO L500 BasicCegarLoop]: trace histogram [134, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:46:23,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-19 08:46:23,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265,SelfDestructingSolverStorable266 [2022-03-19 08:46:23,496 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:46:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:46:23,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1385680111, now seen corresponding path program 265 times [2022-03-19 08:46:23,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:46:23,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [135140217] [2022-03-19 08:46:23,769 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:46:23,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1938077296, now seen corresponding path program 1 times [2022-03-19 08:46:23,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:46:23,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359625464] [2022-03-19 08:46:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:46:23,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:46:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:46:23,771 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:46:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:46:23,772 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:46:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1385680111, now seen corresponding path program 266 times [2022-03-19 08:46:23,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:46:23,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330765707] [2022-03-19 08:46:23,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:46:23,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:46:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:46:27,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:46:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:46:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 134 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:46:27,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:46:27,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330765707] [2022-03-19 08:46:27,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330765707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:46:27,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553241105] [2022-03-19 08:46:27,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:46:27,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:46:27,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:46:27,514 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:46:27,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-19 08:46:27,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:46:27,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:46:27,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 135 conjunts are in the unsatisfiable core [2022-03-19 08:46:27,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:46:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 134 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:46:27,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:46:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 134 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:46:37,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553241105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:46:37,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:46:37,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 136, 136] total 272 [2022-03-19 08:46:37,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:46:37,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [135140217] [2022-03-19 08:46:37,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [135140217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:46:37,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:46:37,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-03-19 08:46:37,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429657336] [2022-03-19 08:46:37,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:46:37,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-03-19 08:46:37,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:46:37,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-03-19 08:46:37,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36587, Invalid=37125, Unknown=0, NotChecked=0, Total=73712 [2022-03-19 08:46:37,824 INFO L87 Difference]: Start difference. First operand 281 states and 283 transitions. Second operand has 137 states, 137 states have (on average 2.0072992700729926) internal successors, (275), 136 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:46:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:46:42,971 INFO L93 Difference]: Finished difference Result 290 states and 294 transitions. [2022-03-19 08:46:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-19 08:46:42,971 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0072992700729926) internal successors, (275), 136 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-03-19 08:46:42,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:46:42,972 INFO L225 Difference]: With dead ends: 290 [2022-03-19 08:46:42,972 INFO L226 Difference]: Without dead ends: 283 [2022-03-19 08:46:42,979 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9708 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=72902, Invalid=91528, Unknown=0, NotChecked=0, Total=164430 [2022-03-19 08:46:42,980 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 08:46:42,980 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 44 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 08:46:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-19 08:46:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-03-19 08:46:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:46:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 285 transitions. [2022-03-19 08:46:42,988 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 285 transitions. Word has length 279 [2022-03-19 08:46:42,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:46:42,988 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 285 transitions. [2022-03-19 08:46:42,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.0072992700729926) internal successors, (275), 136 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:46:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 285 transitions. [2022-03-19 08:46:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-03-19 08:46:42,989 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:46:42,989 INFO L500 BasicCegarLoop]: trace histogram [135, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:46:43,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-19 08:46:43,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267,SelfDestructingSolverStorable268 [2022-03-19 08:46:43,191 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:46:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:46:43,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2111109324, now seen corresponding path program 267 times [2022-03-19 08:46:43,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:46:43,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1550580353] [2022-03-19 08:46:43,419 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:46:43,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1878971952, now seen corresponding path program 1 times [2022-03-19 08:46:43,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:46:43,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39935912] [2022-03-19 08:46:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:46:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:46:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:46:43,422 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:46:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:46:43,423 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:46:43,423 INFO L85 PathProgramCache]: Analyzing trace with hash 2111109324, now seen corresponding path program 268 times [2022-03-19 08:46:43,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:46:43,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835467802] [2022-03-19 08:46:43,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:46:43,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:46:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:46:47,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:46:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:46:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 135 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:46:47,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:46:47,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835467802] [2022-03-19 08:46:47,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835467802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:46:47,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624909003] [2022-03-19 08:46:47,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 08:46:47,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:46:47,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:46:47,065 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:46:47,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-19 08:46:47,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 08:46:47,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:46:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 136 conjunts are in the unsatisfiable core [2022-03-19 08:46:47,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:46:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 135 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:46:47,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:46:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18225 backedges. 135 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:46:57,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624909003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:46:57,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:46:57,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 137, 137] total 274 [2022-03-19 08:46:57,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:46:57,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1550580353] [2022-03-19 08:46:57,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1550580353] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:46:57,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:46:57,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-03-19 08:46:57,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640743531] [2022-03-19 08:46:57,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:46:57,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-03-19 08:46:57,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:46:57,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-03-19 08:46:57,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37130, Invalid=37672, Unknown=0, NotChecked=0, Total=74802 [2022-03-19 08:46:57,677 INFO L87 Difference]: Start difference. First operand 283 states and 285 transitions. Second operand has 138 states, 138 states have (on average 2.0072463768115942) internal successors, (277), 137 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:47:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:47:02,690 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2022-03-19 08:47:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-19 08:47:02,690 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0072463768115942) internal successors, (277), 137 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-03-19 08:47:02,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:47:02,691 INFO L225 Difference]: With dead ends: 292 [2022-03-19 08:47:02,691 INFO L226 Difference]: Without dead ends: 285 [2022-03-19 08:47:02,726 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9848 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=73986, Invalid=92886, Unknown=0, NotChecked=0, Total=166872 [2022-03-19 08:47:02,727 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 08:47:02,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 39 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 08:47:02,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-19 08:47:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-03-19 08:47:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0107142857142857) internal successors, (283), 280 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:47:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 287 transitions. [2022-03-19 08:47:02,734 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 287 transitions. Word has length 281 [2022-03-19 08:47:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:47:02,735 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 287 transitions. [2022-03-19 08:47:02,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0072463768115942) internal successors, (277), 137 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:47:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 287 transitions. [2022-03-19 08:47:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-03-19 08:47:02,735 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:47:02,735 INFO L500 BasicCegarLoop]: trace histogram [136, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:47:02,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-19 08:47:02,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270,SelfDestructingSolverStorable269 [2022-03-19 08:47:02,943 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:47:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:47:02,944 INFO L85 PathProgramCache]: Analyzing trace with hash -831086231, now seen corresponding path program 269 times [2022-03-19 08:47:02,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:47:02,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145225941] [2022-03-19 08:47:03,228 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:47:03,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1819866608, now seen corresponding path program 1 times [2022-03-19 08:47:03,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:47:03,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090905299] [2022-03-19 08:47:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:47:03,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:47:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:47:03,231 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:47:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:47:03,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:47:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash -831086231, now seen corresponding path program 270 times [2022-03-19 08:47:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:47:03,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841774821] [2022-03-19 08:47:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:47:03,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:47:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:47:06,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:47:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:47:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 136 proven. 18360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:47:06,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:47:06,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841774821] [2022-03-19 08:47:06,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841774821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:47:06,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596108545] [2022-03-19 08:47:06,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 08:47:06,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:47:06,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:47:06,485 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:47:06,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-19 08:47:06,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 08:47:06,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:47:06,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 08:47:06,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:47:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 405 proven. 1 refuted. 0 times theorem prover too weak. 18090 trivial. 0 not checked. [2022-03-19 08:47:06,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:47:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18496 backedges. 405 proven. 1 refuted. 0 times theorem prover too weak. 18090 trivial. 0 not checked. [2022-03-19 08:47:06,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596108545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:47:06,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:47:06,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 4, 4] total 143 [2022-03-19 08:47:06,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:47:06,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145225941] [2022-03-19 08:47:06,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145225941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:47:06,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:47:06,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-03-19 08:47:06,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464349579] [2022-03-19 08:47:06,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:47:06,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-03-19 08:47:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:47:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-03-19 08:47:06,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-03-19 08:47:06,996 INFO L87 Difference]: Start difference. First operand 285 states and 287 transitions. Second operand has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 138 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:47:12,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 08:47:12,242 INFO L93 Difference]: Finished difference Result 294 states and 298 transitions. [2022-03-19 08:47:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-19 08:47:12,242 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 138 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-03-19 08:47:12,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 08:47:12,243 INFO L225 Difference]: With dead ends: 294 [2022-03-19 08:47:12,243 INFO L226 Difference]: Without dead ends: 287 [2022-03-19 08:47:12,246 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 841 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=29461, Invalid=48101, Unknown=0, NotChecked=0, Total=77562 [2022-03-19 08:47:12,246 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 08:47:12,246 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 39 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 08:47:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-19 08:47:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-03-19 08:47:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.0106382978723405) internal successors, (285), 282 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:47:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 289 transitions. [2022-03-19 08:47:12,254 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 289 transitions. Word has length 283 [2022-03-19 08:47:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 08:47:12,255 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 289 transitions. [2022-03-19 08:47:12,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0071942446043165) internal successors, (279), 138 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 08:47:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 289 transitions. [2022-03-19 08:47:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-03-19 08:47:12,255 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 08:47:12,255 INFO L500 BasicCegarLoop]: trace histogram [137, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 08:47:12,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-19 08:47:12,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,SelfDestructingSolverStorable271,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:47:12,473 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 08:47:12,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 08:47:12,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2102433478, now seen corresponding path program 271 times [2022-03-19 08:47:12,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 08:47:12,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [665236265] [2022-03-19 08:47:12,777 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-19 08:47:12,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1760761264, now seen corresponding path program 1 times [2022-03-19 08:47:12,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:47:12,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170055880] [2022-03-19 08:47:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:47:12,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:47:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:47:12,780 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-19 08:47:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-19 08:47:12,784 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-19 08:47:12,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2102433478, now seen corresponding path program 272 times [2022-03-19 08:47:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 08:47:12,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364346781] [2022-03-19 08:47:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 08:47:12,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 08:47:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:47:17,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 08:47:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 08:47:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 137 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:47:17,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 08:47:17,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364346781] [2022-03-19 08:47:17,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364346781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 08:47:17,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290990706] [2022-03-19 08:47:17,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 08:47:17,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 08:47:17,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 08:47:17,056 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 08:47:17,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-19 08:47:17,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 08:47:17,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 08:47:17,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-19 08:47:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 08:47:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 137 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:47:17,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 08:47:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18769 backedges. 137 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 08:47:28,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290990706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 08:47:28,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 08:47:28,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-19 08:47:28,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 08:47:28,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [665236265] [2022-03-19 08:47:28,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [665236265] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 08:47:28,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 08:47:28,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-03-19 08:47:28,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778960059] [2022-03-19 08:47:28,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 08:47:28,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-19 08:47:28,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 08:47:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-19 08:47:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-19 08:47:28,619 INFO L87 Difference]: Start difference. First operand 287 states and 289 transitions. Second operand has 140 states, 140 states have (on average 2.007142857142857) internal successors, (281), 139 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)