/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/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:29:03,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:29:03,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:29:03,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:29:03,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:29:03,792 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:29:03,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:29:03,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:29:03,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:29:03,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:29:03,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:29:03,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:29:03,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:29:03,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:29:03,796 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:29:03,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:29:03,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:29:03,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:29:03,796 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:29:03,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:29:03,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:29:03,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:29:03,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:29:03,797 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:29:03,797 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:29:03,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:29:03,797 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:29:03,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:29:04,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:29:04,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:29:04,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:29:04,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:29:04,035 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:29:04,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2022-03-18 00:29:04,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72e1d1a6/8fa45c7a79af48d9950cb5527c658ed4/FLAGd121d974b [2022-03-18 00:29:04,474 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:29:04,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i [2022-03-18 00:29:04,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72e1d1a6/8fa45c7a79af48d9950cb5527c658ed4/FLAGd121d974b [2022-03-18 00:29:04,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72e1d1a6/8fa45c7a79af48d9950cb5527c658ed4 [2022-03-18 00:29:04,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:29:04,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:29:04,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:29:04,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:29:04,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:29:04,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:29:04" (1/1) ... [2022-03-18 00:29:04,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df56311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:29:04, skipping insertion in model container [2022-03-18 00:29:04,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:29:04" (1/1) ... [2022-03-18 00:29:04,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:29:04,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:29:04,688 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i[895,908] [2022-03-18 00:29:04,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:29:04,706 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:29:04,716 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i[895,908] [2022-03-18 00:29:04,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:29:04,727 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:29:04,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:29:04 WrapperNode [2022-03-18 00:29:04,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:29:04,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:29:04,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:29:04,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:29:04,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:29:04" (1/1) ... [2022-03-18 00:29:04,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:29:04" (1/1) ... [2022-03-18 00:29:04,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:29:04" (1/1) ... [2022-03-18 00:29:04,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:29:04" (1/1) ... [2022-03-18 00:29:04,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:29:04" (1/1) ... [2022-03-18 00:29:04,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:29:04" (1/1) ... [2022-03-18 00:29:04,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:29:04" (1/1) ... [2022-03-18 00:29:04,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:29:04,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:29:04,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:29:04,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:29:04,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:29:04" (1/1) ... [2022-03-18 00:29:04,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:29:04,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:04,794 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) [2022-03-18 00:29:04,796 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 [2022-03-18 00:29:04,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:29:04,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:29:04,821 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:29:04,821 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 00:29:04,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:29:04,822 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:29:04,822 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:29:04,822 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:29:04,823 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 00:29:04,823 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 00:29:04,823 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:29:04,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:29:04,823 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 00:29:04,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:29:04,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 00:29:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:29:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:29:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:29:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:29:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:29:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:29:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:29:04,881 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:29:04,882 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:29:05,008 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:29:05,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:29:05,021 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 00:29:05,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:29:05 BoogieIcfgContainer [2022-03-18 00:29:05,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:29:05,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:29:05,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:29:05,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:29:05,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:29:04" (1/3) ... [2022-03-18 00:29:05,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167871b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:29:05, skipping insertion in model container [2022-03-18 00:29:05,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:29:04" (2/3) ... [2022-03-18 00:29:05,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167871b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:29:05, skipping insertion in model container [2022-03-18 00:29:05,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:29:05" (3/3) ... [2022-03-18 00:29:05,045 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.i [2022-03-18 00:29:05,049 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:29:05,049 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:29:05,081 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:29:05,086 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 [2022-03-18 00:29:05,087 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:29:05,098 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) [2022-03-18 00:29:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:29:05,103 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:05,104 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:05,104 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:05,108 INFO L85 PathProgramCache]: Analyzing trace with hash -242008288, now seen corresponding path program 1 times [2022-03-18 00:29:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:05,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [765586636] [2022-03-18 00:29:05,123 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:29:05,123 INFO L85 PathProgramCache]: Analyzing trace with hash -242008288, now seen corresponding path program 2 times [2022-03-18 00:29:05,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:05,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596043157] [2022-03-18 00:29:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:05,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:05,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:05,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:05,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596043157] [2022-03-18 00:29:05,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596043157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:05,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:05,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:29:05,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:05,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [765586636] [2022-03-18 00:29:05,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [765586636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:05,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:05,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:29:05,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324744538] [2022-03-18 00:29:05,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:05,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:29:05,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:05,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:29:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:29:05,339 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) [2022-03-18 00:29:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:05,388 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-18 00:29:05,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:29:05,390 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 [2022-03-18 00:29:05,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:05,394 INFO L225 Difference]: With dead ends: 32 [2022-03-18 00:29:05,394 INFO L226 Difference]: Without dead ends: 13 [2022-03-18 00:29:05,396 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 [2022-03-18 00:29:05,402 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 [2022-03-18 00:29:05,404 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] [2022-03-18 00:29:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-18 00:29:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-18 00:29:05,436 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) [2022-03-18 00:29:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-18 00:29:05,438 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-18 00:29:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:05,439 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-18 00:29:05,439 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) [2022-03-18 00:29:05,439 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-18 00:29:05,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:29:05,440 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:05,440 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:05,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:29:05,442 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:05,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:05,444 INFO L85 PathProgramCache]: Analyzing trace with hash -251243498, now seen corresponding path program 1 times [2022-03-18 00:29:05,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:05,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [173106558] [2022-03-18 00:29:05,446 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:29:05,446 INFO L85 PathProgramCache]: Analyzing trace with hash -251243498, now seen corresponding path program 2 times [2022-03-18 00:29:05,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:05,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514191879] [2022-03-18 00:29:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:05,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:05,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:05,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:05,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514191879] [2022-03-18 00:29:05,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514191879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:05,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:05,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:29:05,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:05,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [173106558] [2022-03-18 00:29:05,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [173106558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:05,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:05,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:29:05,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147043824] [2022-03-18 00:29:05,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:05,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:29:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:05,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:29:05,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:29:05,518 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) [2022-03-18 00:29:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:05,559 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-18 00:29:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:29:05,560 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 [2022-03-18 00:29:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:05,561 INFO L225 Difference]: With dead ends: 22 [2022-03-18 00:29:05,561 INFO L226 Difference]: Without dead ends: 15 [2022-03-18 00:29:05,561 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:29:05,562 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 [2022-03-18 00:29:05,563 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] [2022-03-18 00:29:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-18 00:29:05,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-18 00:29:05,567 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) [2022-03-18 00:29:05,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-18 00:29:05,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-18 00:29:05,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:05,568 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-18 00:29:05,568 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) [2022-03-18 00:29:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-18 00:29:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 00:29:05,569 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:05,569 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:05,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:29:05,569 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:05,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:05,570 INFO L85 PathProgramCache]: Analyzing trace with hash 85580979, now seen corresponding path program 1 times [2022-03-18 00:29:05,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:05,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [847428953] [2022-03-18 00:29:05,658 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:29:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1895159821, now seen corresponding path program 1 times [2022-03-18 00:29:05,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:05,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060085000] [2022-03-18 00:29:05,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:05,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:05,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:05,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:05,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060085000] [2022-03-18 00:29:05,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060085000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:05,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:05,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:29:05,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:05,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [847428953] [2022-03-18 00:29:05,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [847428953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:05,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:05,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:29:05,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817503250] [2022-03-18 00:29:05,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:05,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:29:05,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:29:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:29:05,798 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) [2022-03-18 00:29:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:05,865 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-18 00:29:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:29:05,865 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 [2022-03-18 00:29:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:05,866 INFO L225 Difference]: With dead ends: 22 [2022-03-18 00:29:05,866 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 00:29:05,866 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 [2022-03-18 00:29:05,867 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 [2022-03-18 00:29:05,868 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] [2022-03-18 00:29:05,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 00:29:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 00:29:05,871 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) [2022-03-18 00:29:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-18 00:29:05,872 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-03-18 00:29:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:05,872 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-18 00:29:05,872 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) [2022-03-18 00:29:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-18 00:29:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 00:29:05,873 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:05,873 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:05,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 00:29:05,873 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:05,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:05,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1708614478, now seen corresponding path program 1 times [2022-03-18 00:29:05,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:05,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1096631052] [2022-03-18 00:29:06,460 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:06,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1954265165, now seen corresponding path program 1 times [2022-03-18 00:29:06,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:06,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192724413] [2022-03-18 00:29:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:06,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:06,474 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:06,495 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:06,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1708614478, now seen corresponding path program 2 times [2022-03-18 00:29:06,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:06,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020355332] [2022-03-18 00:29:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:06,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:06,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:06,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:06,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020355332] [2022-03-18 00:29:06,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020355332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:06,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072654543] [2022-03-18 00:29:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:06,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:06,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:06,539 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) [2022-03-18 00:29:06,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 00:29:06,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:06,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:06,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 00:29:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:06,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:06,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072654543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:06,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:06,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 00:29:06,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:06,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1096631052] [2022-03-18 00:29:06,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1096631052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:06,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:06,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:29:06,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190337354] [2022-03-18 00:29:06,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:06,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:29:06,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:06,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:29:06,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:29:06,734 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) [2022-03-18 00:29:06,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:06,797 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-03-18 00:29:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:29:06,797 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 [2022-03-18 00:29:06,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:06,798 INFO L225 Difference]: With dead ends: 26 [2022-03-18 00:29:06,798 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 00:29:06,798 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:29:06,799 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 [2022-03-18 00:29:06,800 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] [2022-03-18 00:29:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 00:29:06,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-18 00:29:06,804 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) [2022-03-18 00:29:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-18 00:29:06,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-03-18 00:29:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:06,807 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-18 00:29:06,808 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) [2022-03-18 00:29:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-18 00:29:06,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:29:06,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:06,808 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:06,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:07,027 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 [2022-03-18 00:29:07,028 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:07,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:07,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1114942101, now seen corresponding path program 3 times [2022-03-18 00:29:07,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:07,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [610041673] [2022-03-18 00:29:07,318 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:07,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2013370509, now seen corresponding path program 1 times [2022-03-18 00:29:07,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:07,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192618880] [2022-03-18 00:29:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:07,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:07,327 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:07,334 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:07,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1114942101, now seen corresponding path program 4 times [2022-03-18 00:29:07,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:07,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288001304] [2022-03-18 00:29:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:07,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:07,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:07,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:07,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288001304] [2022-03-18 00:29:07,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288001304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:07,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403430615] [2022-03-18 00:29:07,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:07,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:07,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:07,378 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) [2022-03-18 00:29:07,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 00:29:07,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:07,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:07,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:29:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:07,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:07,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403430615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:07,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:07,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 00:29:07,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:07,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [610041673] [2022-03-18 00:29:07,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [610041673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:07,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:07,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:29:07,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844649637] [2022-03-18 00:29:07,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:07,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:29:07,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:29:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:29:07,508 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) [2022-03-18 00:29:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:07,558 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-03-18 00:29:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:29:07,559 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 [2022-03-18 00:29:07,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:07,559 INFO L225 Difference]: With dead ends: 28 [2022-03-18 00:29:07,560 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 00:29:07,561 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 [2022-03-18 00:29:07,564 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 [2022-03-18 00:29:07,565 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] [2022-03-18 00:29:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 00:29:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-18 00:29:07,569 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) [2022-03-18 00:29:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-18 00:29:07,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2022-03-18 00:29:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:07,570 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-18 00:29:07,570 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) [2022-03-18 00:29:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-18 00:29:07,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 00:29:07,571 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:07,571 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:07,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:07,771 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 [2022-03-18 00:29:07,772 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash -133483448, now seen corresponding path program 5 times [2022-03-18 00:29:07,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:07,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1980448831] [2022-03-18 00:29:08,044 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2072475853, now seen corresponding path program 1 times [2022-03-18 00:29:08,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:08,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006901521] [2022-03-18 00:29:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:08,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:08,059 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:08,076 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:08,077 INFO L85 PathProgramCache]: Analyzing trace with hash -133483448, now seen corresponding path program 6 times [2022-03-18 00:29:08,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:08,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731343881] [2022-03-18 00:29:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:08,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:08,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:08,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:08,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731343881] [2022-03-18 00:29:08,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731343881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:08,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443557573] [2022-03-18 00:29:08,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:08,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:08,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:08,152 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) [2022-03-18 00:29:08,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 00:29:08,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 00:29:08,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:08,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 00:29:08,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 00:29:08,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 00:29:08,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443557573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:08,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:08,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-03-18 00:29:08,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:08,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1980448831] [2022-03-18 00:29:08,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1980448831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:08,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:08,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:29:08,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288874987] [2022-03-18 00:29:08,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:08,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:29:08,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:08,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:29:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:29:08,337 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) [2022-03-18 00:29:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:08,397 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-03-18 00:29:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:29:08,397 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 [2022-03-18 00:29:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:08,399 INFO L225 Difference]: With dead ends: 30 [2022-03-18 00:29:08,399 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 00:29:08,399 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 [2022-03-18 00:29:08,402 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 [2022-03-18 00:29:08,405 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] [2022-03-18 00:29:08,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 00:29:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-18 00:29:08,411 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) [2022-03-18 00:29:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-18 00:29:08,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2022-03-18 00:29:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:08,416 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-18 00:29:08,416 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) [2022-03-18 00:29:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-18 00:29:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 00:29:08,417 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:08,417 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:08,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:08,623 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 [2022-03-18 00:29:08,624 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:08,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1844523035, now seen corresponding path program 7 times [2022-03-18 00:29:08,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:08,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1989481545] [2022-03-18 00:29:08,868 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:08,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2131581197, now seen corresponding path program 1 times [2022-03-18 00:29:08,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:08,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452183856] [2022-03-18 00:29:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:08,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:08,876 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:08,894 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:08,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1844523035, now seen corresponding path program 8 times [2022-03-18 00:29:08,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:08,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588919837] [2022-03-18 00:29:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:08,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:08,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:08,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:08,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588919837] [2022-03-18 00:29:08,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588919837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:08,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682007887] [2022-03-18 00:29:08,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:08,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:08,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:08,988 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) [2022-03-18 00:29:08,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 00:29:09,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:09,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:09,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:29:09,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:09,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:09,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682007887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:09,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:09,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-18 00:29:09,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:09,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1989481545] [2022-03-18 00:29:09,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1989481545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:09,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:09,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:29:09,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92217747] [2022-03-18 00:29:09,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:09,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:29:09,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:09,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:29:09,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:29:09,162 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) [2022-03-18 00:29:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:09,226 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-18 00:29:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:29:09,226 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 [2022-03-18 00:29:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:09,228 INFO L225 Difference]: With dead ends: 32 [2022-03-18 00:29:09,228 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 00:29:09,228 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 [2022-03-18 00:29:09,229 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 [2022-03-18 00:29:09,230 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] [2022-03-18 00:29:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 00:29:09,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-18 00:29:09,237 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) [2022-03-18 00:29:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-03-18 00:29:09,238 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-03-18 00:29:09,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:09,238 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-03-18 00:29:09,239 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) [2022-03-18 00:29:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-03-18 00:29:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:29:09,242 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:09,242 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:09,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:09,455 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 [2022-03-18 00:29:09,455 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1181091774, now seen corresponding path program 9 times [2022-03-18 00:29:09,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:09,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015987535] [2022-03-18 00:29:09,670 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:09,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2104280755, now seen corresponding path program 1 times [2022-03-18 00:29:09,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:09,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836347207] [2022-03-18 00:29:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:09,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:09,676 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:09,685 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1181091774, now seen corresponding path program 10 times [2022-03-18 00:29:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:09,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637590320] [2022-03-18 00:29:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:09,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:09,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:09,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:09,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637590320] [2022-03-18 00:29:09,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637590320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:09,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242208653] [2022-03-18 00:29:09,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:09,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:09,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:09,748 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) [2022-03-18 00:29:09,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 00:29:09,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:09,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:09,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:29:09,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:09,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:09,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242208653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:09,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:09,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-18 00:29:09,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:09,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015987535] [2022-03-18 00:29:09,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015987535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:09,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:09,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:29:09,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843077266] [2022-03-18 00:29:09,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:09,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:29:09,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:09,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:29:09,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:29:09,939 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) [2022-03-18 00:29:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:10,020 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-18 00:29:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:29:10,021 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 [2022-03-18 00:29:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:10,022 INFO L225 Difference]: With dead ends: 34 [2022-03-18 00:29:10,022 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 00:29:10,024 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 [2022-03-18 00:29:10,025 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 [2022-03-18 00:29:10,025 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] [2022-03-18 00:29:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 00:29:10,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 00:29:10,036 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) [2022-03-18 00:29:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-03-18 00:29:10,037 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2022-03-18 00:29:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:10,038 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-03-18 00:29:10,038 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) [2022-03-18 00:29:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-03-18 00:29:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 00:29:10,038 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:10,038 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:10,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:10,254 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 [2022-03-18 00:29:10,255 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:10,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:10,255 INFO L85 PathProgramCache]: Analyzing trace with hash 721190239, now seen corresponding path program 11 times [2022-03-18 00:29:10,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:10,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [560250214] [2022-03-18 00:29:10,489 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:10,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2045175411, now seen corresponding path program 1 times [2022-03-18 00:29:10,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:10,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733776372] [2022-03-18 00:29:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:10,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:10,500 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:10,509 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash 721190239, now seen corresponding path program 12 times [2022-03-18 00:29:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:10,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717122127] [2022-03-18 00:29:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:10,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:10,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:10,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:10,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717122127] [2022-03-18 00:29:10,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717122127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:10,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024348197] [2022-03-18 00:29:10,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:10,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:10,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:10,584 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) [2022-03-18 00:29:10,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 00:29:10,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:29:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:29:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 00:29:10,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 00:29:10,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024348197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:10,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:10,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 18 [2022-03-18 00:29:10,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [560250214] [2022-03-18 00:29:10,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [560250214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:10,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:10,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:29:10,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126465158] [2022-03-18 00:29:10,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:10,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:29:10,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:10,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:29:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:29:10,805 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) [2022-03-18 00:29:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:10,895 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-03-18 00:29:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:29:10,896 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 [2022-03-18 00:29:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:10,896 INFO L225 Difference]: With dead ends: 36 [2022-03-18 00:29:10,896 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 00:29:10,897 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=336, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:29:10,898 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 [2022-03-18 00:29:10,898 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] [2022-03-18 00:29:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 00:29:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-18 00:29:10,901 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) [2022-03-18 00:29:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-18 00:29:10,902 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-03-18 00:29:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:10,902 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-18 00:29:10,902 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) [2022-03-18 00:29:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-18 00:29:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 00:29:10,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:10,903 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:10,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:11,123 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 [2022-03-18 00:29:11,123 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:11,124 INFO L85 PathProgramCache]: Analyzing trace with hash -841863364, now seen corresponding path program 13 times [2022-03-18 00:29:11,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:11,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [276595311] [2022-03-18 00:29:11,285 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:11,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1986070067, now seen corresponding path program 1 times [2022-03-18 00:29:11,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:11,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939224446] [2022-03-18 00:29:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:11,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:11,300 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:11,308 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:11,308 INFO L85 PathProgramCache]: Analyzing trace with hash -841863364, now seen corresponding path program 14 times [2022-03-18 00:29:11,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:11,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031433830] [2022-03-18 00:29:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:11,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:11,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:11,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:11,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031433830] [2022-03-18 00:29:11,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031433830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:11,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098932091] [2022-03-18 00:29:11,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:11,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:11,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:11,395 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) [2022-03-18 00:29:11,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 00:29:11,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:11,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:11,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 00:29:11,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:11,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:11,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098932091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:11,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:11,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-18 00:29:11,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:11,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [276595311] [2022-03-18 00:29:11,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [276595311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:11,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:11,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:29:11,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126207059] [2022-03-18 00:29:11,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:11,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:29:11,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:11,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:29:11,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:29:11,613 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) [2022-03-18 00:29:11,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:11,723 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-03-18 00:29:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:29:11,723 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 [2022-03-18 00:29:11,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:11,724 INFO L225 Difference]: With dead ends: 38 [2022-03-18 00:29:11,724 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 00:29:11,725 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:29:11,725 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 [2022-03-18 00:29:11,725 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] [2022-03-18 00:29:11,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 00:29:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-18 00:29:11,729 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) [2022-03-18 00:29:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-03-18 00:29:11,729 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2022-03-18 00:29:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:11,730 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-03-18 00:29:11,730 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) [2022-03-18 00:29:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-03-18 00:29:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 00:29:11,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:11,730 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:11,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:11,939 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 [2022-03-18 00:29:11,939 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:11,940 INFO L85 PathProgramCache]: Analyzing trace with hash 302177753, now seen corresponding path program 15 times [2022-03-18 00:29:11,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:11,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1911833759] [2022-03-18 00:29:12,178 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:12,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1926964723, now seen corresponding path program 1 times [2022-03-18 00:29:12,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:12,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935876019] [2022-03-18 00:29:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:12,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:12,183 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:12,187 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:12,187 INFO L85 PathProgramCache]: Analyzing trace with hash 302177753, now seen corresponding path program 16 times [2022-03-18 00:29:12,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:12,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742835420] [2022-03-18 00:29:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:12,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:12,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:12,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742835420] [2022-03-18 00:29:12,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742835420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:12,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736488005] [2022-03-18 00:29:12,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:12,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:12,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:12,261 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) [2022-03-18 00:29:12,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 00:29:12,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:12,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:12,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 00:29:12,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:12,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:12,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736488005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:12,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:12,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-18 00:29:12,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:12,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1911833759] [2022-03-18 00:29:12,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1911833759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:12,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:12,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:29:12,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364577066] [2022-03-18 00:29:12,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:12,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:29:12,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:12,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:29:12,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:29:12,531 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) [2022-03-18 00:29:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:12,654 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-03-18 00:29:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:29:12,655 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 [2022-03-18 00:29:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:12,656 INFO L225 Difference]: With dead ends: 40 [2022-03-18 00:29:12,656 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 00:29:12,657 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 [2022-03-18 00:29:12,657 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 [2022-03-18 00:29:12,657 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] [2022-03-18 00:29:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 00:29:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 00:29:12,660 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) [2022-03-18 00:29:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-18 00:29:12,661 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-03-18 00:29:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:12,661 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-18 00:29:12,661 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) [2022-03-18 00:29:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-18 00:29:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 00:29:12,662 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:12,662 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:12,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:12,862 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 [2022-03-18 00:29:12,863 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:12,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:12,863 INFO L85 PathProgramCache]: Analyzing trace with hash 214063414, now seen corresponding path program 17 times [2022-03-18 00:29:12,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:12,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [485635111] [2022-03-18 00:29:13,109 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:13,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1867859379, now seen corresponding path program 1 times [2022-03-18 00:29:13,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:13,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517221190] [2022-03-18 00:29:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:13,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:13,128 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:13,132 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:13,132 INFO L85 PathProgramCache]: Analyzing trace with hash 214063414, now seen corresponding path program 18 times [2022-03-18 00:29:13,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:13,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397410254] [2022-03-18 00:29:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:13,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:13,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:13,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:13,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397410254] [2022-03-18 00:29:13,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397410254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:13,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934402573] [2022-03-18 00:29:13,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:13,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:13,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:13,211 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) [2022-03-18 00:29:13,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 00:29:13,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:29:13,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:29:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 00:29:13,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-18 00:29:13,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934402573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:13,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:13,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 17 [2022-03-18 00:29:13,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:13,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [485635111] [2022-03-18 00:29:13,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [485635111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:13,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:13,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:29:13,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034044430] [2022-03-18 00:29:13,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:13,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:29:13,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:13,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:29:13,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:29:13,388 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) [2022-03-18 00:29:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:13,522 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-18 00:29:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:29:13,522 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 [2022-03-18 00:29:13,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:13,523 INFO L225 Difference]: With dead ends: 42 [2022-03-18 00:29:13,523 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 00:29:13,523 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=410, Unknown=0, NotChecked=0, Total=702 [2022-03-18 00:29:13,524 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 [2022-03-18 00:29:13,524 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] [2022-03-18 00:29:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 00:29:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 00:29:13,528 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) [2022-03-18 00:29:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-03-18 00:29:13,528 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2022-03-18 00:29:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:13,528 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-03-18 00:29:13,528 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) [2022-03-18 00:29:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-03-18 00:29:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 00:29:13,529 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:13,529 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:13,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:13,739 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 [2022-03-18 00:29:13,739 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:13,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1435529555, now seen corresponding path program 19 times [2022-03-18 00:29:13,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:13,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1156791339] [2022-03-18 00:29:13,916 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:13,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1808754035, now seen corresponding path program 1 times [2022-03-18 00:29:13,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:13,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807423442] [2022-03-18 00:29:13,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:13,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:13,921 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:13,924 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1435529555, now seen corresponding path program 20 times [2022-03-18 00:29:13,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:13,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682197201] [2022-03-18 00:29:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:13,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:14,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:14,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:14,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682197201] [2022-03-18 00:29:14,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682197201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:14,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439080751] [2022-03-18 00:29:14,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:14,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:14,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:14,025 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) [2022-03-18 00:29:14,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 00:29:14,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:14,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:14,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 00:29:14,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:14,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:14,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439080751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:14,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:14,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-18 00:29:14,340 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:14,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1156791339] [2022-03-18 00:29:14,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1156791339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:14,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:14,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:29:14,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841635950] [2022-03-18 00:29:14,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:14,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:29:14,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:14,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:29:14,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:29:14,342 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) [2022-03-18 00:29:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:14,483 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-03-18 00:29:14,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:29:14,483 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 [2022-03-18 00:29:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:14,484 INFO L225 Difference]: With dead ends: 44 [2022-03-18 00:29:14,484 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 00:29:14,485 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:29:14,485 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 [2022-03-18 00:29:14,485 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] [2022-03-18 00:29:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 00:29:14,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-18 00:29:14,489 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) [2022-03-18 00:29:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-18 00:29:14,489 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2022-03-18 00:29:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:14,490 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-18 00:29:14,490 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) [2022-03-18 00:29:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-18 00:29:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 00:29:14,490 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:14,491 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:14,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-18 00:29:14,703 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 [2022-03-18 00:29:14,703 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1556548048, now seen corresponding path program 21 times [2022-03-18 00:29:14,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:14,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1462072276] [2022-03-18 00:29:14,909 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1749648691, now seen corresponding path program 1 times [2022-03-18 00:29:14,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:14,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260365334] [2022-03-18 00:29:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:14,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:14,914 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:14,917 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1556548048, now seen corresponding path program 22 times [2022-03-18 00:29:14,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:14,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709977526] [2022-03-18 00:29:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:14,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:15,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:15,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:15,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709977526] [2022-03-18 00:29:15,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709977526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:15,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174821647] [2022-03-18 00:29:15,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:15,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:15,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:15,017 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) [2022-03-18 00:29:15,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 00:29:15,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:15,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:15,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 00:29:15,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:15,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:15,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174821647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:15,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:15,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-18 00:29:15,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:15,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1462072276] [2022-03-18 00:29:15,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1462072276] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:15,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:15,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:29:15,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917200294] [2022-03-18 00:29:15,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:15,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:29:15,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:29:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:29:15,365 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) [2022-03-18 00:29:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:15,510 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-03-18 00:29:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:29:15,510 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 [2022-03-18 00:29:15,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:15,511 INFO L225 Difference]: With dead ends: 46 [2022-03-18 00:29:15,511 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 00:29:15,512 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 [2022-03-18 00:29:15,512 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:15,513 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:29:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 00:29:15,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-18 00:29:15,516 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) [2022-03-18 00:29:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-03-18 00:29:15,517 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2022-03-18 00:29:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:15,517 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-03-18 00:29:15,517 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) [2022-03-18 00:29:15,517 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-03-18 00:29:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 00:29:15,518 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:15,518 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:15,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:15,723 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 [2022-03-18 00:29:15,723 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:15,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash 684963789, now seen corresponding path program 23 times [2022-03-18 00:29:15,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:15,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1093181669] [2022-03-18 00:29:15,891 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1690543347, now seen corresponding path program 1 times [2022-03-18 00:29:15,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:15,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665440071] [2022-03-18 00:29:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:15,895 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:15,899 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:15,899 INFO L85 PathProgramCache]: Analyzing trace with hash 684963789, now seen corresponding path program 24 times [2022-03-18 00:29:15,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:15,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482914893] [2022-03-18 00:29:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:15,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:15,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:16,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482914893] [2022-03-18 00:29:16,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482914893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176110647] [2022-03-18 00:29:16,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:16,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:16,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:16,016 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) [2022-03-18 00:29:16,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 00:29:16,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:29:16,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:16,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:29:16,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-18 00:29:16,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-18 00:29:16,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176110647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:16,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:16,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 4, 4] total 20 [2022-03-18 00:29:16,214 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:16,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1093181669] [2022-03-18 00:29:16,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1093181669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:16,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:16,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:29:16,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626513917] [2022-03-18 00:29:16,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:16,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:29:16,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:16,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:29:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:29:16,216 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) [2022-03-18 00:29:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:16,389 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-03-18 00:29:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:29:16,389 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 [2022-03-18 00:29:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:16,390 INFO L225 Difference]: With dead ends: 48 [2022-03-18 00:29:16,390 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 00:29:16,390 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 [2022-03-18 00:29:16,391 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 [2022-03-18 00:29:16,391 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] [2022-03-18 00:29:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 00:29:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-18 00:29:16,395 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) [2022-03-18 00:29:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-03-18 00:29:16,395 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2022-03-18 00:29:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:16,395 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-03-18 00:29:16,396 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) [2022-03-18 00:29:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-03-18 00:29:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 00:29:16,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:16,396 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:16,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:16,607 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 [2022-03-18 00:29:16,607 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:16,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:16,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1295743446, now seen corresponding path program 25 times [2022-03-18 00:29:16,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:16,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [999404322] [2022-03-18 00:29:16,830 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:16,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1631438003, now seen corresponding path program 1 times [2022-03-18 00:29:16,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:16,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779201335] [2022-03-18 00:29:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:16,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:16,835 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:16,838 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1295743446, now seen corresponding path program 26 times [2022-03-18 00:29:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:16,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619849852] [2022-03-18 00:29:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:16,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:16,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:16,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:16,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619849852] [2022-03-18 00:29:16,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619849852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:16,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361281256] [2022-03-18 00:29:16,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:16,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:16,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:16,973 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) [2022-03-18 00:29:16,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 00:29:17,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:17,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:17,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 00:29:17,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:17,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:17,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361281256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:17,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:17,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-18 00:29:17,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [999404322] [2022-03-18 00:29:17,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [999404322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:17,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:17,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 00:29:17,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353247953] [2022-03-18 00:29:17,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:17,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 00:29:17,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:17,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 00:29:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:29:17,433 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) [2022-03-18 00:29:17,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:17,626 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-03-18 00:29:17,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:29:17,626 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 [2022-03-18 00:29:17,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:17,627 INFO L225 Difference]: With dead ends: 50 [2022-03-18 00:29:17,627 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 00:29:17,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:29:17,628 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 [2022-03-18 00:29:17,628 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] [2022-03-18 00:29:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 00:29:17,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-18 00:29:17,632 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) [2022-03-18 00:29:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-03-18 00:29:17,632 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2022-03-18 00:29:17,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:17,633 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-03-18 00:29:17,633 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) [2022-03-18 00:29:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-03-18 00:29:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 00:29:17,633 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:17,633 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:17,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:17,847 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 [2022-03-18 00:29:17,847 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2084884153, now seen corresponding path program 27 times [2022-03-18 00:29:17,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:17,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1413385726] [2022-03-18 00:29:18,046 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:18,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1572332659, now seen corresponding path program 1 times [2022-03-18 00:29:18,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:18,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550212858] [2022-03-18 00:29:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:18,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:18,050 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:18,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:18,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2084884153, now seen corresponding path program 28 times [2022-03-18 00:29:18,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:18,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721814338] [2022-03-18 00:29:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:18,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:18,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:18,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:18,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721814338] [2022-03-18 00:29:18,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721814338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:18,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530861739] [2022-03-18 00:29:18,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:18,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:18,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:18,204 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) [2022-03-18 00:29:18,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 00:29:18,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:18,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:18,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 00:29:18,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:18,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:18,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530861739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:18,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:18,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-18 00:29:18,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:18,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1413385726] [2022-03-18 00:29:18,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1413385726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:18,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:18,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:29:18,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203416700] [2022-03-18 00:29:18,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:18,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:29:18,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:29:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:29:18,635 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) [2022-03-18 00:29:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:18,828 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-18 00:29:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 00:29:18,828 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 [2022-03-18 00:29:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:18,829 INFO L225 Difference]: With dead ends: 52 [2022-03-18 00:29:18,829 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 00:29:18,830 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 00:29:18,830 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:18,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 00:29:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-18 00:29:18,834 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) [2022-03-18 00:29:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-03-18 00:29:18,835 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2022-03-18 00:29:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:18,835 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-03-18 00:29:18,835 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) [2022-03-18 00:29:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-03-18 00:29:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 00:29:18,836 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:18,836 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:18,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:19,047 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 [2022-03-18 00:29:19,047 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash -239892188, now seen corresponding path program 29 times [2022-03-18 00:29:19,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:19,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498061010] [2022-03-18 00:29:19,228 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1513227315, now seen corresponding path program 1 times [2022-03-18 00:29:19,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:19,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723462852] [2022-03-18 00:29:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:19,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:19,232 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:19,235 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash -239892188, now seen corresponding path program 30 times [2022-03-18 00:29:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:19,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335160565] [2022-03-18 00:29:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:19,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:19,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:19,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:19,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335160565] [2022-03-18 00:29:19,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335160565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:19,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127778700] [2022-03-18 00:29:19,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:19,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:19,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:19,396 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) [2022-03-18 00:29:19,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 00:29:19,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:29:19,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:19,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:29:19,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 00:29:19,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 00:29:19,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127778700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:19,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:19,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 4] total 23 [2022-03-18 00:29:19,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:19,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498061010] [2022-03-18 00:29:19,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498061010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:19,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:19,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 00:29:19,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786147591] [2022-03-18 00:29:19,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:19,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 00:29:19,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:19,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 00:29:19,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:29:19,592 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) [2022-03-18 00:29:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:19,785 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2022-03-18 00:29:19,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:29:19,785 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 [2022-03-18 00:29:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:19,786 INFO L225 Difference]: With dead ends: 54 [2022-03-18 00:29:19,786 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 00:29:19,786 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 [2022-03-18 00:29:19,787 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 [2022-03-18 00:29:19,787 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] [2022-03-18 00:29:19,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 00:29:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-18 00:29:19,792 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) [2022-03-18 00:29:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-03-18 00:29:19,793 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2022-03-18 00:29:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:19,793 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-03-18 00:29:19,793 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) [2022-03-18 00:29:19,793 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-03-18 00:29:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 00:29:19,794 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:19,794 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:19,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:19,999 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 [2022-03-18 00:29:19,999 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:20,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1024107071, now seen corresponding path program 31 times [2022-03-18 00:29:20,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:20,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [44322476] [2022-03-18 00:29:20,196 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:20,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1454121971, now seen corresponding path program 1 times [2022-03-18 00:29:20,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:20,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013517991] [2022-03-18 00:29:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:20,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:20,199 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:20,202 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:20,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1024107071, now seen corresponding path program 32 times [2022-03-18 00:29:20,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:20,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223222638] [2022-03-18 00:29:20,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:20,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:20,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:20,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:20,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223222638] [2022-03-18 00:29:20,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223222638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:20,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184186498] [2022-03-18 00:29:20,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:20,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:20,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:20,362 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) [2022-03-18 00:29:20,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 00:29:20,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:20,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:20,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 00:29:20,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:20,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:20,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184186498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:20,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:20,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-18 00:29:20,898 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:20,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [44322476] [2022-03-18 00:29:20,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [44322476] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:20,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:20,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:29:20,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478614462] [2022-03-18 00:29:20,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:20,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:29:20,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:20,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:29:20,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 00:29:20,899 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) [2022-03-18 00:29:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:21,132 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-03-18 00:29:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 00:29:21,133 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 [2022-03-18 00:29:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:21,133 INFO L225 Difference]: With dead ends: 56 [2022-03-18 00:29:21,133 INFO L226 Difference]: Without dead ends: 49 [2022-03-18 00:29:21,134 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 00:29:21,134 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 [2022-03-18 00:29:21,135 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] [2022-03-18 00:29:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-18 00:29:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-18 00:29:21,138 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) [2022-03-18 00:29:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-03-18 00:29:21,139 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2022-03-18 00:29:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:21,139 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-03-18 00:29:21,140 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) [2022-03-18 00:29:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-03-18 00:29:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 00:29:21,140 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:21,140 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:21,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:21,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33,SelfDestructingSolverStorable34 [2022-03-18 00:29:21,347 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:21,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1259634462, now seen corresponding path program 33 times [2022-03-18 00:29:21,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:21,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1653210240] [2022-03-18 00:29:21,547 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:21,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1395016627, now seen corresponding path program 1 times [2022-03-18 00:29:21,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:21,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222613961] [2022-03-18 00:29:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:21,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:21,551 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:21,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:21,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1259634462, now seen corresponding path program 34 times [2022-03-18 00:29:21,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:21,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874416594] [2022-03-18 00:29:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:21,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:21,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:21,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:21,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874416594] [2022-03-18 00:29:21,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874416594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:21,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833428844] [2022-03-18 00:29:21,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:21,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:21,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:21,724 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) [2022-03-18 00:29:21,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 00:29:21,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:21,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:21,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 00:29:21,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:21,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:22,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833428844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:22,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:22,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-18 00:29:22,321 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:22,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1653210240] [2022-03-18 00:29:22,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1653210240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:22,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:22,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 00:29:22,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778635519] [2022-03-18 00:29:22,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:22,322 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 00:29:22,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:22,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 00:29:22,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:29:22,323 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) [2022-03-18 00:29:22,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:22,559 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-03-18 00:29:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:29:22,559 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 [2022-03-18 00:29:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:22,560 INFO L225 Difference]: With dead ends: 58 [2022-03-18 00:29:22,560 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 00:29:22,561 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 00:29:22,561 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 [2022-03-18 00:29:22,561 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] [2022-03-18 00:29:22,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 00:29:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-18 00:29:22,565 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) [2022-03-18 00:29:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-03-18 00:29:22,566 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2022-03-18 00:29:22,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:22,566 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-03-18 00:29:22,566 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) [2022-03-18 00:29:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-03-18 00:29:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 00:29:22,566 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:22,567 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:22,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:22,775 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 [2022-03-18 00:29:22,776 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:22,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1206959419, now seen corresponding path program 35 times [2022-03-18 00:29:22,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:22,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1718619408] [2022-03-18 00:29:22,965 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1335911283, now seen corresponding path program 1 times [2022-03-18 00:29:22,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:22,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346073431] [2022-03-18 00:29:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:22,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:22,969 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:22,972 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1206959419, now seen corresponding path program 36 times [2022-03-18 00:29:22,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:22,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470711059] [2022-03-18 00:29:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:22,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:23,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:23,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:23,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470711059] [2022-03-18 00:29:23,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470711059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:23,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509586361] [2022-03-18 00:29:23,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:23,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:23,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:23,160 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) [2022-03-18 00:29:23,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 00:29:23,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:29:23,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:23,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:29:23,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-18 00:29:23,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-03-18 00:29:23,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509586361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:23,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:23,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 4, 4] total 26 [2022-03-18 00:29:23,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:23,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1718619408] [2022-03-18 00:29:23,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1718619408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:23,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:23,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:29:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006060462] [2022-03-18 00:29:23,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:23,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:29:23,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:29:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:29:23,365 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) [2022-03-18 00:29:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:23,620 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-18 00:29:23,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 00:29:23,620 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 [2022-03-18 00:29:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:23,621 INFO L225 Difference]: With dead ends: 60 [2022-03-18 00:29:23,621 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 00:29:23,622 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1184, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 00:29:23,622 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:23,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 00:29:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-18 00:29:23,628 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) [2022-03-18 00:29:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-03-18 00:29:23,628 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2022-03-18 00:29:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:23,628 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-03-18 00:29:23,628 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) [2022-03-18 00:29:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-03-18 00:29:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 00:29:23,629 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:23,629 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:23,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:23,843 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 [2022-03-18 00:29:23,843 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:23,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2125850648, now seen corresponding path program 37 times [2022-03-18 00:29:23,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:23,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1006292908] [2022-03-18 00:29:24,045 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:24,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1276805939, now seen corresponding path program 1 times [2022-03-18 00:29:24,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:24,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476923739] [2022-03-18 00:29:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:24,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:24,050 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:24,054 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2125850648, now seen corresponding path program 38 times [2022-03-18 00:29:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:24,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541047785] [2022-03-18 00:29:24,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:24,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:24,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:24,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541047785] [2022-03-18 00:29:24,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541047785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:24,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654447548] [2022-03-18 00:29:24,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:24,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:24,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:24,282 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) [2022-03-18 00:29:24,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 00:29:24,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:24,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:24,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 00:29:24,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:24,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:24,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654447548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:24,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:24,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-18 00:29:24,877 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:24,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1006292908] [2022-03-18 00:29:24,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1006292908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:24,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:24,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 00:29:24,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827612085] [2022-03-18 00:29:24,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:24,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 00:29:24,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:24,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 00:29:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:29:24,879 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) [2022-03-18 00:29:25,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:25,158 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-03-18 00:29:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:29:25,159 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 [2022-03-18 00:29:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:25,159 INFO L225 Difference]: With dead ends: 62 [2022-03-18 00:29:25,159 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 00:29:25,160 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:29:25,161 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:25,162 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 00:29:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-18 00:29:25,166 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) [2022-03-18 00:29:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-03-18 00:29:25,167 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2022-03-18 00:29:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:25,167 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-03-18 00:29:25,167 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) [2022-03-18 00:29:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-03-18 00:29:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 00:29:25,168 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:25,168 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:25,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:25,390 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 [2022-03-18 00:29:25,391 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:25,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:25,391 INFO L85 PathProgramCache]: Analyzing trace with hash 417058741, now seen corresponding path program 39 times [2022-03-18 00:29:25,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:25,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [820740128] [2022-03-18 00:29:25,554 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:25,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1217700595, now seen corresponding path program 1 times [2022-03-18 00:29:25,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:25,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425981702] [2022-03-18 00:29:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:25,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:25,558 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:25,563 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:25,563 INFO L85 PathProgramCache]: Analyzing trace with hash 417058741, now seen corresponding path program 40 times [2022-03-18 00:29:25,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:25,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110967888] [2022-03-18 00:29:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:25,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:25,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:25,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:25,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110967888] [2022-03-18 00:29:25,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110967888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:25,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778681802] [2022-03-18 00:29:25,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:25,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:25,779 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) [2022-03-18 00:29:25,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 00:29:25,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:25,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:25,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 00:29:25,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:25,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:26,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778681802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:26,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:26,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-18 00:29:26,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:26,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [820740128] [2022-03-18 00:29:26,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [820740128] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:26,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:26,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 00:29:26,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613084592] [2022-03-18 00:29:26,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:26,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 00:29:26,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:26,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 00:29:26,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:29:26,407 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) [2022-03-18 00:29:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:26,674 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-03-18 00:29:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 00:29:26,675 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 [2022-03-18 00:29:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:26,675 INFO L225 Difference]: With dead ends: 64 [2022-03-18 00:29:26,676 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 00:29:26,677 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:29:26,677 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 [2022-03-18 00:29:26,677 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] [2022-03-18 00:29:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 00:29:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-18 00:29:26,681 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) [2022-03-18 00:29:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-03-18 00:29:26,681 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 53 [2022-03-18 00:29:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:26,682 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-03-18 00:29:26,682 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) [2022-03-18 00:29:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-03-18 00:29:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 00:29:26,682 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:26,682 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:26,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:26,887 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 [2022-03-18 00:29:26,888 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1054456814, now seen corresponding path program 41 times [2022-03-18 00:29:26,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:26,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [990968738] [2022-03-18 00:29:27,068 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:27,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1158595251, now seen corresponding path program 1 times [2022-03-18 00:29:27,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:27,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988587024] [2022-03-18 00:29:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:27,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:27,072 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:27,075 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:27,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1054456814, now seen corresponding path program 42 times [2022-03-18 00:29:27,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:27,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5663058] [2022-03-18 00:29:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:27,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:27,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:27,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5663058] [2022-03-18 00:29:27,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5663058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383907582] [2022-03-18 00:29:27,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:27,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:27,291 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) [2022-03-18 00:29:27,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 00:29:27,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:29:27,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:27,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:29:27,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 00:29:27,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 00:29:27,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383907582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:27,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:27,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 29 [2022-03-18 00:29:27,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:27,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [990968738] [2022-03-18 00:29:27,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [990968738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:27,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:27,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 00:29:27,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554045048] [2022-03-18 00:29:27,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:27,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 00:29:27,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:27,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 00:29:27,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-03-18 00:29:27,512 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) [2022-03-18 00:29:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:27,839 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-03-18 00:29:27,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 00:29:27,839 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 [2022-03-18 00:29:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:27,840 INFO L225 Difference]: With dead ends: 66 [2022-03-18 00:29:27,840 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 00:29:27,841 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1018, Invalid=1532, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 00:29:27,841 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:27,841 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 49 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:27,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 00:29:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-18 00:29:27,844 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) [2022-03-18 00:29:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-03-18 00:29:27,844 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2022-03-18 00:29:27,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:27,844 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-03-18 00:29:27,845 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) [2022-03-18 00:29:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-03-18 00:29:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 00:29:27,845 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:27,845 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:27,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-18 00:29:28,045 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 [2022-03-18 00:29:28,046 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:28,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:28,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2136664785, now seen corresponding path program 43 times [2022-03-18 00:29:28,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:28,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1423375738] [2022-03-18 00:29:28,242 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:28,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1099489907, now seen corresponding path program 1 times [2022-03-18 00:29:28,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:28,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313000002] [2022-03-18 00:29:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:28,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:28,247 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:28,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2136664785, now seen corresponding path program 44 times [2022-03-18 00:29:28,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:28,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198368094] [2022-03-18 00:29:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:28,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:28,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:28,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:28,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198368094] [2022-03-18 00:29:28,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198368094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:28,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204145372] [2022-03-18 00:29:28,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:28,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:28,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:28,484 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) [2022-03-18 00:29:28,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 00:29:28,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:28,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 00:29:28,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:28,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:29,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204145372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:29,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:29,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-18 00:29:29,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1423375738] [2022-03-18 00:29:29,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1423375738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:29,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:29,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 00:29:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225883012] [2022-03-18 00:29:29,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:29,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 00:29:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:29,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 00:29:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:29:29,203 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) [2022-03-18 00:29:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:29,536 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-03-18 00:29:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 00:29:29,536 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 [2022-03-18 00:29:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:29,537 INFO L225 Difference]: With dead ends: 68 [2022-03-18 00:29:29,537 INFO L226 Difference]: Without dead ends: 61 [2022-03-18 00:29:29,539 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 00:29:29,539 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:29,539 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-18 00:29:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-18 00:29:29,543 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) [2022-03-18 00:29:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-03-18 00:29:29,543 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2022-03-18 00:29:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:29,543 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-03-18 00:29:29,543 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) [2022-03-18 00:29:29,543 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-03-18 00:29:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 00:29:29,544 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:29,544 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:29,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-18 00:29:29,747 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 [2022-03-18 00:29:29,747 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1538528012, now seen corresponding path program 45 times [2022-03-18 00:29:29,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:29,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [217719898] [2022-03-18 00:29:29,893 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:29,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1040384563, now seen corresponding path program 1 times [2022-03-18 00:29:29,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:29,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646268679] [2022-03-18 00:29:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:29,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:29,897 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:29,899 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1538528012, now seen corresponding path program 46 times [2022-03-18 00:29:29,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:29,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662045682] [2022-03-18 00:29:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:29,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:30,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:30,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:30,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662045682] [2022-03-18 00:29:30,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662045682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:30,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60581525] [2022-03-18 00:29:30,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:30,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:30,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:30,151 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) [2022-03-18 00:29:30,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 00:29:30,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:30,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 00:29:30,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:30,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:30,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60581525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:30,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:30,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-18 00:29:30,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:30,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [217719898] [2022-03-18 00:29:30,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [217719898] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:30,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:30,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 00:29:30,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763429592] [2022-03-18 00:29:30,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:30,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 00:29:30,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 00:29:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:29:30,918 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) [2022-03-18 00:29:31,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:31,242 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-03-18 00:29:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 00:29:31,243 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 [2022-03-18 00:29:31,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:31,244 INFO L225 Difference]: With dead ends: 70 [2022-03-18 00:29:31,244 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 00:29:31,245 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 00:29:31,246 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:31,246 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 19 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 00:29:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-18 00:29:31,249 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) [2022-03-18 00:29:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-03-18 00:29:31,249 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 59 [2022-03-18 00:29:31,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:31,250 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-03-18 00:29:31,250 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) [2022-03-18 00:29:31,250 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-03-18 00:29:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 00:29:31,250 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:31,250 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:31,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-18 00:29:31,467 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 [2022-03-18 00:29:31,467 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:31,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:31,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1359278679, now seen corresponding path program 47 times [2022-03-18 00:29:31,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:31,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [137050555] [2022-03-18 00:29:31,662 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash -981279219, now seen corresponding path program 1 times [2022-03-18 00:29:31,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:31,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818154167] [2022-03-18 00:29:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:31,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:31,665 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:31,668 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1359278679, now seen corresponding path program 48 times [2022-03-18 00:29:31,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:31,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864303098] [2022-03-18 00:29:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:31,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:31,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:31,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:31,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864303098] [2022-03-18 00:29:31,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864303098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:31,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686716450] [2022-03-18 00:29:31,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:31,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:31,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:31,939 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) [2022-03-18 00:29:31,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 00:29:31,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:29:31,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:31,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:29:31,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-18 00:29:32,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-03-18 00:29:32,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686716450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:32,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:32,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 32 [2022-03-18 00:29:32,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:32,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [137050555] [2022-03-18 00:29:32,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [137050555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:32,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:32,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 00:29:32,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870978714] [2022-03-18 00:29:32,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:32,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 00:29:32,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:32,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 00:29:32,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:29:32,245 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) [2022-03-18 00:29:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:32,583 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-03-18 00:29:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 00:29:32,584 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 [2022-03-18 00:29:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:32,584 INFO L225 Difference]: With dead ends: 72 [2022-03-18 00:29:32,584 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 00:29:32,585 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1267, Invalid=1925, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 00:29:32,586 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 [2022-03-18 00:29:32,586 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] [2022-03-18 00:29:32,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 00:29:32,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-18 00:29:32,589 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) [2022-03-18 00:29:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-03-18 00:29:32,590 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2022-03-18 00:29:32,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:32,590 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-03-18 00:29:32,590 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) [2022-03-18 00:29:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-03-18 00:29:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 00:29:32,590 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:32,591 INFO L500 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:32,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-18 00:29:32,812 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 [2022-03-18 00:29:32,813 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:32,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:32,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1282266374, now seen corresponding path program 49 times [2022-03-18 00:29:32,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:32,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [12848613] [2022-03-18 00:29:32,996 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:32,997 INFO L85 PathProgramCache]: Analyzing trace with hash -922173875, now seen corresponding path program 1 times [2022-03-18 00:29:32,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:32,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101638125] [2022-03-18 00:29:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:32,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:33,000 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:33,006 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1282266374, now seen corresponding path program 50 times [2022-03-18 00:29:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:33,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637672136] [2022-03-18 00:29:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:33,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:33,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:33,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637672136] [2022-03-18 00:29:33,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637672136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:33,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34008914] [2022-03-18 00:29:33,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:33,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:33,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:33,295 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) [2022-03-18 00:29:33,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 00:29:33,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:33,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:33,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 00:29:33,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:33,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:34,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34008914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:34,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:34,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 54 [2022-03-18 00:29:34,110 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:34,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [12848613] [2022-03-18 00:29:34,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [12848613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:34,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:34,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 00:29:34,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842021041] [2022-03-18 00:29:34,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:34,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 00:29:34,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:34,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 00:29:34,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:29:34,112 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) [2022-03-18 00:29:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:34,501 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2022-03-18 00:29:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 00:29:34,501 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 [2022-03-18 00:29:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:34,501 INFO L225 Difference]: With dead ends: 74 [2022-03-18 00:29:34,501 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 00:29:34,502 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2759, Invalid=3561, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 00:29:34,503 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 [2022-03-18 00:29:34,503 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] [2022-03-18 00:29:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 00:29:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-18 00:29:34,506 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) [2022-03-18 00:29:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-03-18 00:29:34,507 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2022-03-18 00:29:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:34,507 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-03-18 00:29:34,507 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) [2022-03-18 00:29:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-03-18 00:29:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 00:29:34,507 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:34,508 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:34,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-18 00:29:34,711 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 [2022-03-18 00:29:34,711 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:34,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:34,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1481390371, now seen corresponding path program 51 times [2022-03-18 00:29:34,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:34,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1952647790] [2022-03-18 00:29:34,876 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash -863068531, now seen corresponding path program 1 times [2022-03-18 00:29:34,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:34,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522647569] [2022-03-18 00:29:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:34,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:34,879 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:34,881 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:34,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1481390371, now seen corresponding path program 52 times [2022-03-18 00:29:34,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:34,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384169572] [2022-03-18 00:29:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:35,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:35,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384169572] [2022-03-18 00:29:35,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384169572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135310399] [2022-03-18 00:29:35,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:35,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:35,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:35,237 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) [2022-03-18 00:29:35,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 00:29:35,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:35,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:35,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 00:29:35,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:35,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:36,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135310399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:36,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:36,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 54 [2022-03-18 00:29:36,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:36,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1952647790] [2022-03-18 00:29:36,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1952647790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:36,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:36,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 00:29:36,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807045497] [2022-03-18 00:29:36,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:36,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 00:29:36,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:36,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 00:29:36,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:29:36,112 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) [2022-03-18 00:29:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:36,522 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-03-18 00:29:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 00:29:36,522 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 [2022-03-18 00:29:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:36,523 INFO L225 Difference]: With dead ends: 76 [2022-03-18 00:29:36,523 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 00:29:36,524 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2812, Invalid=3668, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 00:29:36,524 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:36,524 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 39 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:36,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 00:29:36,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-18 00:29:36,528 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) [2022-03-18 00:29:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-03-18 00:29:36,528 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2022-03-18 00:29:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:36,529 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-03-18 00:29:36,529 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) [2022-03-18 00:29:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-03-18 00:29:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 00:29:36,529 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:36,529 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:36,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:36,735 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 [2022-03-18 00:29:36,735 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:36,736 INFO L85 PathProgramCache]: Analyzing trace with hash -433976832, now seen corresponding path program 53 times [2022-03-18 00:29:36,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:36,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1933874989] [2022-03-18 00:29:36,913 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:36,914 INFO L85 PathProgramCache]: Analyzing trace with hash -803963187, now seen corresponding path program 1 times [2022-03-18 00:29:36,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:36,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607438303] [2022-03-18 00:29:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:36,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:36,917 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:36,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash -433976832, now seen corresponding path program 54 times [2022-03-18 00:29:36,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:36,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076317108] [2022-03-18 00:29:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:36,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:37,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:37,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:37,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076317108] [2022-03-18 00:29:37,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076317108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:37,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033109728] [2022-03-18 00:29:37,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:37,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:37,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:37,296 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) [2022-03-18 00:29:37,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 00:29:37,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:29:37,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:37,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:29:37,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-18 00:29:37,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 81 proven. 1 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-03-18 00:29:37,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033109728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:37,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:37,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 4, 4] total 35 [2022-03-18 00:29:37,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:37,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1933874989] [2022-03-18 00:29:37,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1933874989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:37,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:37,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 00:29:37,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856747503] [2022-03-18 00:29:37,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:37,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 00:29:37,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:37,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 00:29:37,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 00:29:37,575 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) [2022-03-18 00:29:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:38,020 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-03-18 00:29:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 00:29:38,021 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 [2022-03-18 00:29:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:38,021 INFO L225 Difference]: With dead ends: 78 [2022-03-18 00:29:38,021 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 00:29:38,022 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1543, Invalid=2363, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 00:29:38,022 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:38,023 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 24 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 00:29:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-18 00:29:38,026 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) [2022-03-18 00:29:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-03-18 00:29:38,027 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2022-03-18 00:29:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:38,027 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-03-18 00:29:38,027 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) [2022-03-18 00:29:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-03-18 00:29:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 00:29:38,028 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:38,028 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:38,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:38,243 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 [2022-03-18 00:29:38,243 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1439111069, now seen corresponding path program 55 times [2022-03-18 00:29:38,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:38,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [147928602] [2022-03-18 00:29:38,442 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:38,443 INFO L85 PathProgramCache]: Analyzing trace with hash -744857843, now seen corresponding path program 1 times [2022-03-18 00:29:38,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:38,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350413137] [2022-03-18 00:29:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:38,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:38,446 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:38,448 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1439111069, now seen corresponding path program 56 times [2022-03-18 00:29:38,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:38,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513409765] [2022-03-18 00:29:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:38,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:38,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:38,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:38,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513409765] [2022-03-18 00:29:38,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513409765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:38,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825584661] [2022-03-18 00:29:38,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:38,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:38,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:38,792 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) [2022-03-18 00:29:38,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 00:29:38,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:38,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:38,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 00:29:38,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:38,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:39,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825584661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:39,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:39,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 54 [2022-03-18 00:29:39,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:39,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [147928602] [2022-03-18 00:29:39,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [147928602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:39,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:39,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 00:29:39,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671118543] [2022-03-18 00:29:39,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:39,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 00:29:39,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:39,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 00:29:39,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:29:39,576 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) [2022-03-18 00:29:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:39,999 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-03-18 00:29:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 00:29:40,000 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 [2022-03-18 00:29:40,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:40,000 INFO L225 Difference]: With dead ends: 80 [2022-03-18 00:29:40,000 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 00:29:40,001 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2918, Invalid=3888, Unknown=0, NotChecked=0, Total=6806 [2022-03-18 00:29:40,002 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:40,002 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 19 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:40,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 00:29:40,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-18 00:29:40,006 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) [2022-03-18 00:29:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-03-18 00:29:40,006 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2022-03-18 00:29:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:40,006 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-03-18 00:29:40,007 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) [2022-03-18 00:29:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-03-18 00:29:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 00:29:40,007 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:40,007 INFO L500 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:40,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:40,223 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 [2022-03-18 00:29:40,223 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1885286906, now seen corresponding path program 57 times [2022-03-18 00:29:40,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:40,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1230240631] [2022-03-18 00:29:40,429 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash -685752499, now seen corresponding path program 1 times [2022-03-18 00:29:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:40,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974079678] [2022-03-18 00:29:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:40,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:40,432 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:40,435 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1885286906, now seen corresponding path program 58 times [2022-03-18 00:29:40,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:40,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773756969] [2022-03-18 00:29:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:40,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:40,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:40,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:40,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773756969] [2022-03-18 00:29:40,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773756969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:40,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800629143] [2022-03-18 00:29:40,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:40,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:40,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:40,852 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) [2022-03-18 00:29:40,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 00:29:40,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:40,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:40,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 00:29:40,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:41,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:41,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800629143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:41,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:41,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 54 [2022-03-18 00:29:41,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:41,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1230240631] [2022-03-18 00:29:41,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1230240631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:41,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:41,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 00:29:41,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265622905] [2022-03-18 00:29:41,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:41,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 00:29:41,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:41,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 00:29:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:29:41,663 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) [2022-03-18 00:29:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:42,131 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-03-18 00:29:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 00:29:42,131 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 [2022-03-18 00:29:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:42,132 INFO L225 Difference]: With dead ends: 82 [2022-03-18 00:29:42,132 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 00:29:42,133 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2971, Invalid=4001, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 00:29:42,133 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:42,134 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:42,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 00:29:42,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-18 00:29:42,137 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) [2022-03-18 00:29:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-03-18 00:29:42,137 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 71 [2022-03-18 00:29:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:42,138 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-03-18 00:29:42,138 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) [2022-03-18 00:29:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-03-18 00:29:42,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 00:29:42,138 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:42,138 INFO L500 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:42,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-18 00:29:42,343 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 [2022-03-18 00:29:42,343 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1163536663, now seen corresponding path program 59 times [2022-03-18 00:29:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:42,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [358050606] [2022-03-18 00:29:42,519 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash -626647155, now seen corresponding path program 1 times [2022-03-18 00:29:42,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:42,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67963437] [2022-03-18 00:29:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:42,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:42,527 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:42,540 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:42,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1163536663, now seen corresponding path program 60 times [2022-03-18 00:29:42,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:42,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283590908] [2022-03-18 00:29:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:42,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:42,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:42,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:42,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283590908] [2022-03-18 00:29:42,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283590908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:42,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590465479] [2022-03-18 00:29:42,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:42,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:42,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:42,939 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) [2022-03-18 00:29:42,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 00:29:42,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:29:42,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:42,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:29:42,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-18 00:29:43,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-03-18 00:29:43,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590465479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:43,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:43,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 4, 4] total 38 [2022-03-18 00:29:43,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:43,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [358050606] [2022-03-18 00:29:43,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [358050606] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:43,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:43,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 00:29:43,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285306169] [2022-03-18 00:29:43,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:43,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 00:29:43,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:43,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 00:29:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 00:29:43,191 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) [2022-03-18 00:29:43,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:43,720 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-03-18 00:29:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 00:29:43,720 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 [2022-03-18 00:29:43,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:43,721 INFO L225 Difference]: With dead ends: 84 [2022-03-18 00:29:43,721 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 00:29:43,721 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1846, Invalid=2846, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 00:29:43,722 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:43,722 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:43,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 00:29:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-18 00:29:43,724 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) [2022-03-18 00:29:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-03-18 00:29:43,725 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2022-03-18 00:29:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:43,725 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-03-18 00:29:43,725 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) [2022-03-18 00:29:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-03-18 00:29:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 00:29:43,725 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:43,726 INFO L500 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:43,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-18 00:29:43,932 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 [2022-03-18 00:29:43,933 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash -948712204, now seen corresponding path program 61 times [2022-03-18 00:29:43,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:43,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098235198] [2022-03-18 00:29:44,121 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:44,121 INFO L85 PathProgramCache]: Analyzing trace with hash -567541811, now seen corresponding path program 1 times [2022-03-18 00:29:44,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:44,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826413821] [2022-03-18 00:29:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:44,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:44,125 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:44,128 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:44,128 INFO L85 PathProgramCache]: Analyzing trace with hash -948712204, now seen corresponding path program 62 times [2022-03-18 00:29:44,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:44,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111918276] [2022-03-18 00:29:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:44,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:44,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:44,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111918276] [2022-03-18 00:29:44,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111918276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187629020] [2022-03-18 00:29:44,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:44,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:44,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:44,552 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) [2022-03-18 00:29:44,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 00:29:44,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:44,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:44,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 00:29:44,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:44,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:45,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187629020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:45,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:45,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 54 [2022-03-18 00:29:45,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:45,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098235198] [2022-03-18 00:29:45,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098235198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:45,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:45,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 00:29:45,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099592752] [2022-03-18 00:29:45,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:45,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 00:29:45,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 00:29:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:29:45,304 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) [2022-03-18 00:29:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:45,823 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-03-18 00:29:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 00:29:45,824 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 [2022-03-18 00:29:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:45,824 INFO L225 Difference]: With dead ends: 86 [2022-03-18 00:29:45,824 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 00:29:45,825 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3077, Invalid=4233, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 00:29:45,826 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:45,826 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 39 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:45,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 00:29:45,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-18 00:29:45,829 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) [2022-03-18 00:29:45,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-03-18 00:29:45,830 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2022-03-18 00:29:45,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:45,830 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-03-18 00:29:45,830 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) [2022-03-18 00:29:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-03-18 00:29:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 00:29:45,830 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:45,830 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:45,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-18 00:29:46,035 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 [2022-03-18 00:29:46,035 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash 699657617, now seen corresponding path program 63 times [2022-03-18 00:29:46,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:46,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1835084704] [2022-03-18 00:29:46,206 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash -508436467, now seen corresponding path program 1 times [2022-03-18 00:29:46,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:46,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348086525] [2022-03-18 00:29:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:46,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:46,209 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:46,212 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:46,212 INFO L85 PathProgramCache]: Analyzing trace with hash 699657617, now seen corresponding path program 64 times [2022-03-18 00:29:46,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:46,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357054712] [2022-03-18 00:29:46,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:46,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:46,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:46,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:46,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357054712] [2022-03-18 00:29:46,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357054712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:46,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213452251] [2022-03-18 00:29:46,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:46,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:46,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:46,625 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) [2022-03-18 00:29:46,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 00:29:46,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:46,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:46,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 00:29:46,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:46,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:47,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213452251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:47,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:47,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 54 [2022-03-18 00:29:47,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:47,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1835084704] [2022-03-18 00:29:47,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1835084704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:47,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:47,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 00:29:47,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433969264] [2022-03-18 00:29:47,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:47,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 00:29:47,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 00:29:47,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:29:47,345 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) [2022-03-18 00:29:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:47,939 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-03-18 00:29:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 00:29:47,940 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 [2022-03-18 00:29:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:47,940 INFO L225 Difference]: With dead ends: 88 [2022-03-18 00:29:47,940 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 00:29:47,941 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3130, Invalid=4352, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 00:29:47,941 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:47,941 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 44 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 00:29:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-18 00:29:47,945 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) [2022-03-18 00:29:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-03-18 00:29:47,945 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2022-03-18 00:29:47,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:47,946 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-03-18 00:29:47,946 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) [2022-03-18 00:29:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-03-18 00:29:47,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 00:29:47,946 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:47,946 INFO L500 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:47,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-18 00:29:48,155 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 [2022-03-18 00:29:48,155 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:48,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:48,155 INFO L85 PathProgramCache]: Analyzing trace with hash -59876626, now seen corresponding path program 65 times [2022-03-18 00:29:48,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:48,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [462362637] [2022-03-18 00:29:48,362 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:48,362 INFO L85 PathProgramCache]: Analyzing trace with hash -449331123, now seen corresponding path program 1 times [2022-03-18 00:29:48,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:48,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113500110] [2022-03-18 00:29:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:48,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:48,365 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:48,367 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:48,367 INFO L85 PathProgramCache]: Analyzing trace with hash -59876626, now seen corresponding path program 66 times [2022-03-18 00:29:48,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:48,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135025390] [2022-03-18 00:29:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:48,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:48,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:48,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135025390] [2022-03-18 00:29:48,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135025390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:48,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951114192] [2022-03-18 00:29:48,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:48,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:48,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:48,868 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) [2022-03-18 00:29:48,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 00:29:48,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:29:48,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:48,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:29:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-18 00:29:49,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 99 proven. 1 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2022-03-18 00:29:49,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951114192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:49,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:49,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 4, 4] total 41 [2022-03-18 00:29:49,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:49,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [462362637] [2022-03-18 00:29:49,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [462362637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:49,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:49,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 00:29:49,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323734097] [2022-03-18 00:29:49,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:49,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 00:29:49,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:49,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 00:29:49,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 00:29:49,139 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) [2022-03-18 00:29:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:49,722 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-03-18 00:29:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 00:29:49,722 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 [2022-03-18 00:29:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:49,722 INFO L225 Difference]: With dead ends: 90 [2022-03-18 00:29:49,723 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 00:29:49,723 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2176, Invalid=3374, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 00:29:49,723 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:49,724 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 00:29:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-18 00:29:49,727 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) [2022-03-18 00:29:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-03-18 00:29:49,728 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2022-03-18 00:29:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:49,728 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-03-18 00:29:49,728 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) [2022-03-18 00:29:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-03-18 00:29:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 00:29:49,729 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:49,729 INFO L500 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:49,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-18 00:29:49,931 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 [2022-03-18 00:29:49,931 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:49,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:49,931 INFO L85 PathProgramCache]: Analyzing trace with hash 172156171, now seen corresponding path program 67 times [2022-03-18 00:29:49,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:49,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [572079657] [2022-03-18 00:29:50,131 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:50,131 INFO L85 PathProgramCache]: Analyzing trace with hash -390225779, now seen corresponding path program 1 times [2022-03-18 00:29:50,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:50,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552464532] [2022-03-18 00:29:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:50,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:50,134 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:50,136 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:50,137 INFO L85 PathProgramCache]: Analyzing trace with hash 172156171, now seen corresponding path program 68 times [2022-03-18 00:29:50,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:50,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669605161] [2022-03-18 00:29:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:50,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:50,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:50,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:50,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669605161] [2022-03-18 00:29:50,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669605161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:50,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085759650] [2022-03-18 00:29:50,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:50,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:50,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:50,617 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) [2022-03-18 00:29:50,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 00:29:50,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:50,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:50,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 00:29:50,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:50,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:51,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085759650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:51,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:51,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 54 [2022-03-18 00:29:51,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:51,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [572079657] [2022-03-18 00:29:51,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [572079657] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:51,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:51,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 00:29:51,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235737369] [2022-03-18 00:29:51,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:51,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 00:29:51,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:51,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 00:29:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:29:51,318 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) [2022-03-18 00:29:51,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:51,892 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2022-03-18 00:29:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 00:29:51,892 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 [2022-03-18 00:29:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:51,893 INFO L225 Difference]: With dead ends: 92 [2022-03-18 00:29:51,893 INFO L226 Difference]: Without dead ends: 85 [2022-03-18 00:29:51,893 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3236, Invalid=4596, Unknown=0, NotChecked=0, Total=7832 [2022-03-18 00:29:51,894 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:51,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 29 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:51,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-18 00:29:51,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-18 00:29:51,898 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) [2022-03-18 00:29:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-03-18 00:29:51,898 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2022-03-18 00:29:51,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:51,899 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-03-18 00:29:51,899 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) [2022-03-18 00:29:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-03-18 00:29:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 00:29:51,899 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:51,899 INFO L500 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:51,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-18 00:29:52,107 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 [2022-03-18 00:29:52,107 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:52,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:52,107 INFO L85 PathProgramCache]: Analyzing trace with hash -182625304, now seen corresponding path program 69 times [2022-03-18 00:29:52,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:52,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [493510022] [2022-03-18 00:29:52,254 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:52,254 INFO L85 PathProgramCache]: Analyzing trace with hash -331120435, now seen corresponding path program 1 times [2022-03-18 00:29:52,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:52,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566957526] [2022-03-18 00:29:52,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:52,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:52,257 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:52,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:52,259 INFO L85 PathProgramCache]: Analyzing trace with hash -182625304, now seen corresponding path program 70 times [2022-03-18 00:29:52,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:52,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534390833] [2022-03-18 00:29:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:52,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:52,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:52,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:52,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534390833] [2022-03-18 00:29:52,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534390833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:52,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508356138] [2022-03-18 00:29:52,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:52,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:52,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:52,741 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) [2022-03-18 00:29:52,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 00:29:52,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:52,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:52,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 00:29:52,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:52,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:53,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508356138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:53,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:53,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 54 [2022-03-18 00:29:53,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:53,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [493510022] [2022-03-18 00:29:53,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [493510022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:53,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:53,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 00:29:53,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219982788] [2022-03-18 00:29:53,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:53,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 00:29:53,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:53,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 00:29:53,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:29:53,469 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) [2022-03-18 00:29:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:54,124 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-03-18 00:29:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 00:29:54,125 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 [2022-03-18 00:29:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:54,126 INFO L225 Difference]: With dead ends: 94 [2022-03-18 00:29:54,126 INFO L226 Difference]: Without dead ends: 87 [2022-03-18 00:29:54,127 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3289, Invalid=4721, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 00:29:54,127 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:54,127 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 34 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:54,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-18 00:29:54,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-18 00:29:54,131 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) [2022-03-18 00:29:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-03-18 00:29:54,132 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2022-03-18 00:29:54,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:54,132 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-03-18 00:29:54,132 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) [2022-03-18 00:29:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-03-18 00:29:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 00:29:54,132 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:54,133 INFO L500 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:54,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 00:29:54,333 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 [2022-03-18 00:29:54,333 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:54,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1825206395, now seen corresponding path program 71 times [2022-03-18 00:29:54,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:54,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1667513197] [2022-03-18 00:29:54,531 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash -272015091, now seen corresponding path program 1 times [2022-03-18 00:29:54,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:54,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848116916] [2022-03-18 00:29:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:54,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:54,534 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:54,537 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1825206395, now seen corresponding path program 72 times [2022-03-18 00:29:54,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:54,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930234771] [2022-03-18 00:29:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:54,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:55,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:55,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930234771] [2022-03-18 00:29:55,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930234771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590238918] [2022-03-18 00:29:55,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:29:55,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:55,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:55,046 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) [2022-03-18 00:29:55,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 00:29:55,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:29:55,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:55,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:29:55,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-18 00:29:55,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-03-18 00:29:55,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590238918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:55,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:55,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 4, 4] total 44 [2022-03-18 00:29:55,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:55,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1667513197] [2022-03-18 00:29:55,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1667513197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:55,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:55,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 00:29:55,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317958283] [2022-03-18 00:29:55,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:55,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 00:29:55,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:55,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 00:29:55,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:29:55,356 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) [2022-03-18 00:29:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:55,985 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2022-03-18 00:29:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 00:29:55,985 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 [2022-03-18 00:29:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:55,986 INFO L225 Difference]: With dead ends: 96 [2022-03-18 00:29:55,986 INFO L226 Difference]: Without dead ends: 89 [2022-03-18 00:29:55,986 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2533, Invalid=3947, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 00:29:55,987 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:55,988 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 24 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-18 00:29:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-18 00:29:55,991 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) [2022-03-18 00:29:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-03-18 00:29:55,992 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 85 [2022-03-18 00:29:55,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:55,992 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-03-18 00:29:55,992 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) [2022-03-18 00:29:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-03-18 00:29:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 00:29:55,992 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:55,992 INFO L500 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:56,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-18 00:29:56,193 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 [2022-03-18 00:29:56,193 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:56,193 INFO L85 PathProgramCache]: Analyzing trace with hash 202330082, now seen corresponding path program 73 times [2022-03-18 00:29:56,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:56,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [290581542] [2022-03-18 00:29:56,393 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:56,394 INFO L85 PathProgramCache]: Analyzing trace with hash -212909747, now seen corresponding path program 1 times [2022-03-18 00:29:56,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:56,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642816586] [2022-03-18 00:29:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:56,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:56,396 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:56,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:56,399 INFO L85 PathProgramCache]: Analyzing trace with hash 202330082, now seen corresponding path program 74 times [2022-03-18 00:29:56,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:56,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871252968] [2022-03-18 00:29:56,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:56,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:57,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:57,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871252968] [2022-03-18 00:29:57,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871252968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6922905] [2022-03-18 00:29:57,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:29:57,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:57,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:57,029 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) [2022-03-18 00:29:57,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 00:29:57,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:29:57,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:57,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 00:29:57,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:57,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:29:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:57,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6922905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:29:57,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:29:57,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 54 [2022-03-18 00:29:57,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:29:57,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [290581542] [2022-03-18 00:29:57,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [290581542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:29:57,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:29:57,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 00:29:57,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961166306] [2022-03-18 00:29:57,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:29:57,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 00:29:57,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:57,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 00:29:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:29:57,694 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) [2022-03-18 00:29:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:29:58,378 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-03-18 00:29:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 00:29:58,378 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 [2022-03-18 00:29:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:29:58,379 INFO L225 Difference]: With dead ends: 98 [2022-03-18 00:29:58,379 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 00:29:58,379 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3395, Invalid=4977, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 00:29:58,379 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:29:58,380 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 49 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:29:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 00:29:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-18 00:29:58,383 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) [2022-03-18 00:29:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-03-18 00:29:58,383 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2022-03-18 00:29:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:29:58,383 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-03-18 00:29:58,383 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) [2022-03-18 00:29:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-03-18 00:29:58,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 00:29:58,384 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:29:58,384 INFO L500 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:29:58,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-18 00:29:58,595 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 [2022-03-18 00:29:58,595 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:29:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:29:58,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1250267905, now seen corresponding path program 75 times [2022-03-18 00:29:58,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:29:58,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926795250] [2022-03-18 00:29:58,798 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:29:58,798 INFO L85 PathProgramCache]: Analyzing trace with hash -153804403, now seen corresponding path program 1 times [2022-03-18 00:29:58,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:58,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301565180] [2022-03-18 00:29:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:58,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:58,804 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:29:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:29:58,808 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:29:58,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1250267905, now seen corresponding path program 76 times [2022-03-18 00:29:58,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:29:58,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008263014] [2022-03-18 00:29:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:29:58,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:29:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:59,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:29:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:29:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:59,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:29:59,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008263014] [2022-03-18 00:29:59,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008263014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:29:59,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541278120] [2022-03-18 00:29:59,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:29:59,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:29:59,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:29:59,379 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) [2022-03-18 00:29:59,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 00:29:59,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:29:59,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:29:59,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 00:29:59,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:29:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:29:59,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:00,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541278120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:00,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:00,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 54 [2022-03-18 00:30:00,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:00,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1926795250] [2022-03-18 00:30:00,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1926795250] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:00,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:00,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 00:30:00,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469308577] [2022-03-18 00:30:00,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:00,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 00:30:00,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:00,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 00:30:00,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:30:00,035 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) [2022-03-18 00:30:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:00,722 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-03-18 00:30:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 00:30:00,722 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 [2022-03-18 00:30:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:00,723 INFO L225 Difference]: With dead ends: 100 [2022-03-18 00:30:00,723 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 00:30:00,724 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3448, Invalid=5108, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 00:30:00,724 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:00,724 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:00,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 00:30:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-18 00:30:00,728 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) [2022-03-18 00:30:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-03-18 00:30:00,729 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 89 [2022-03-18 00:30:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:00,729 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-03-18 00:30:00,729 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) [2022-03-18 00:30:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-03-18 00:30:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 00:30:00,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:00,730 INFO L500 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:00,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-18 00:30:00,943 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 [2022-03-18 00:30:00,943 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:00,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:00,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1332562212, now seen corresponding path program 77 times [2022-03-18 00:30:00,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:00,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [73743592] [2022-03-18 00:30:01,140 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash -94699059, now seen corresponding path program 1 times [2022-03-18 00:30:01,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:01,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136381919] [2022-03-18 00:30:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:01,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:01,143 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:01,145 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1332562212, now seen corresponding path program 78 times [2022-03-18 00:30:01,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:01,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870462690] [2022-03-18 00:30:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:01,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:01,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:01,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:01,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870462690] [2022-03-18 00:30:01,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870462690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:01,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140397430] [2022-03-18 00:30:01,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:30:01,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:01,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:01,744 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) [2022-03-18 00:30:01,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 00:30:01,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:30:01,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:01,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:30:01,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-18 00:30:01,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 117 proven. 1 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-03-18 00:30:02,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140397430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:02,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:02,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 4, 4] total 47 [2022-03-18 00:30:02,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:02,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [73743592] [2022-03-18 00:30:02,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [73743592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:02,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:02,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 00:30:02,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157087078] [2022-03-18 00:30:02,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:02,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 00:30:02,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:02,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 00:30:02,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 00:30:02,090 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) [2022-03-18 00:30:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:02,815 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2022-03-18 00:30:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 00:30:02,816 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 [2022-03-18 00:30:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:02,816 INFO L225 Difference]: With dead ends: 102 [2022-03-18 00:30:02,816 INFO L226 Difference]: Without dead ends: 95 [2022-03-18 00:30:02,817 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2917, Invalid=4565, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 00:30:02,817 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:02,817 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 29 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-18 00:30:02,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-18 00:30:02,822 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) [2022-03-18 00:30:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-03-18 00:30:02,822 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 91 [2022-03-18 00:30:02,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:02,822 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-03-18 00:30:02,823 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) [2022-03-18 00:30:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-03-18 00:30:02,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 00:30:02,823 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:02,823 INFO L500 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:02,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-18 00:30:03,039 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 [2022-03-18 00:30:03,039 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1186987385, now seen corresponding path program 79 times [2022-03-18 00:30:03,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:03,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1602180804] [2022-03-18 00:30:03,210 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:03,210 INFO L85 PathProgramCache]: Analyzing trace with hash -35593715, now seen corresponding path program 1 times [2022-03-18 00:30:03,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:03,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549673559] [2022-03-18 00:30:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:03,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:03,213 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:03,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:03,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1186987385, now seen corresponding path program 80 times [2022-03-18 00:30:03,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:03,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465865352] [2022-03-18 00:30:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:03,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:03,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:03,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:03,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465865352] [2022-03-18 00:30:03,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465865352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:03,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453557127] [2022-03-18 00:30:03,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:03,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:03,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:03,841 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) [2022-03-18 00:30:03,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 00:30:03,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:03,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:03,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 00:30:03,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:04,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:04,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453557127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:04,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:04,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 54 [2022-03-18 00:30:04,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:04,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1602180804] [2022-03-18 00:30:04,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1602180804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:04,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:04,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 00:30:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702667391] [2022-03-18 00:30:04,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:04,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 00:30:04,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 00:30:04,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:30:04,452 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) [2022-03-18 00:30:05,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:05,242 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2022-03-18 00:30:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 00:30:05,242 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 [2022-03-18 00:30:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:05,243 INFO L225 Difference]: With dead ends: 104 [2022-03-18 00:30:05,243 INFO L226 Difference]: Without dead ends: 97 [2022-03-18 00:30:05,244 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3554, Invalid=5376, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 00:30:05,244 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:05,244 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-18 00:30:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-18 00:30:05,248 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) [2022-03-18 00:30:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-03-18 00:30:05,248 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 93 [2022-03-18 00:30:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:05,248 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-03-18 00:30:05,248 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) [2022-03-18 00:30:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-03-18 00:30:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 00:30:05,249 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:05,249 INFO L500 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:05,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-18 00:30:05,451 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 [2022-03-18 00:30:05,451 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:05,451 INFO L85 PathProgramCache]: Analyzing trace with hash 112595158, now seen corresponding path program 81 times [2022-03-18 00:30:05,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:05,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [927117154] [2022-03-18 00:30:05,637 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:05,637 INFO L85 PathProgramCache]: Analyzing trace with hash 23511629, now seen corresponding path program 1 times [2022-03-18 00:30:05,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:05,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758055309] [2022-03-18 00:30:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:05,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:05,639 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:05,642 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:05,642 INFO L85 PathProgramCache]: Analyzing trace with hash 112595158, now seen corresponding path program 82 times [2022-03-18 00:30:05,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:05,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7396453] [2022-03-18 00:30:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:05,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:06,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:06,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7396453] [2022-03-18 00:30:06,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7396453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93877942] [2022-03-18 00:30:06,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:30:06,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:06,318 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) [2022-03-18 00:30:06,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 00:30:06,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:30:06,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:06,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 00:30:06,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:06,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:06,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93877942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:06,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:06,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 54 [2022-03-18 00:30:06,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:06,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [927117154] [2022-03-18 00:30:06,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [927117154] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:06,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:06,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 00:30:06,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904096201] [2022-03-18 00:30:06,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:06,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 00:30:06,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:06,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 00:30:06,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:30:06,892 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) [2022-03-18 00:30:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:07,679 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-03-18 00:30:07,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 00:30:07,680 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 [2022-03-18 00:30:07,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:07,680 INFO L225 Difference]: With dead ends: 106 [2022-03-18 00:30:07,680 INFO L226 Difference]: Without dead ends: 99 [2022-03-18 00:30:07,681 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3607, Invalid=5513, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 00:30:07,682 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:07,682 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 29 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:07,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-18 00:30:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-18 00:30:07,687 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) [2022-03-18 00:30:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2022-03-18 00:30:07,687 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 95 [2022-03-18 00:30:07,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:07,688 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2022-03-18 00:30:07,688 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) [2022-03-18 00:30:07,688 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2022-03-18 00:30:07,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 00:30:07,688 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:07,688 INFO L500 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:07,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:07,901 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 [2022-03-18 00:30:07,902 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:07,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1586183949, now seen corresponding path program 83 times [2022-03-18 00:30:07,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:07,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1209999460] [2022-03-18 00:30:08,102 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:08,103 INFO L85 PathProgramCache]: Analyzing trace with hash 82616973, now seen corresponding path program 1 times [2022-03-18 00:30:08,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:08,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544882011] [2022-03-18 00:30:08,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:08,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:08,107 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:08,110 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:08,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1586183949, now seen corresponding path program 84 times [2022-03-18 00:30:08,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:08,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106954333] [2022-03-18 00:30:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:08,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:08,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:08,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:08,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106954333] [2022-03-18 00:30:08,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106954333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:08,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847011773] [2022-03-18 00:30:08,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:30:08,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:08,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:08,812 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) [2022-03-18 00:30:08,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 00:30:08,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:30:08,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:08,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:30:08,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-18 00:30:09,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 126 proven. 1 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-03-18 00:30:09,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847011773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:09,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:09,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 4, 4] total 50 [2022-03-18 00:30:09,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:09,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1209999460] [2022-03-18 00:30:09,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1209999460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:09,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:09,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 00:30:09,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446922553] [2022-03-18 00:30:09,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:09,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 00:30:09,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:09,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 00:30:09,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:30:09,164 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) [2022-03-18 00:30:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:09,986 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2022-03-18 00:30:09,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 00:30:09,987 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 [2022-03-18 00:30:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:09,987 INFO L225 Difference]: With dead ends: 108 [2022-03-18 00:30:09,987 INFO L226 Difference]: Without dead ends: 101 [2022-03-18 00:30:09,988 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3328, Invalid=5228, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 00:30:09,988 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:09,988 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 44 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-18 00:30:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-18 00:30:09,993 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) [2022-03-18 00:30:09,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-03-18 00:30:09,994 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2022-03-18 00:30:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:09,994 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-03-18 00:30:09,994 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) [2022-03-18 00:30:09,994 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-03-18 00:30:09,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 00:30:09,994 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:09,995 INFO L500 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:10,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:10,207 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 [2022-03-18 00:30:10,207 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:10,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2025333296, now seen corresponding path program 85 times [2022-03-18 00:30:10,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:10,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1841651603] [2022-03-18 00:30:10,371 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash 141722317, now seen corresponding path program 1 times [2022-03-18 00:30:10,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:10,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336511886] [2022-03-18 00:30:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:10,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:10,375 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:10,377 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2025333296, now seen corresponding path program 86 times [2022-03-18 00:30:10,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:10,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381417647] [2022-03-18 00:30:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:10,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:11,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:11,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381417647] [2022-03-18 00:30:11,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381417647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:11,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521956487] [2022-03-18 00:30:11,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:11,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:11,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:11,087 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) [2022-03-18 00:30:11,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-18 00:30:11,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:11,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:11,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 00:30:11,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:11,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:11,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521956487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:11,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:11,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 54 [2022-03-18 00:30:11,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:11,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1841651603] [2022-03-18 00:30:11,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1841651603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:11,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:11,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 00:30:11,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502534960] [2022-03-18 00:30:11,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:11,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 00:30:11,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:11,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 00:30:11,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:30:11,697 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) [2022-03-18 00:30:12,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:12,554 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2022-03-18 00:30:12,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 00:30:12,555 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 [2022-03-18 00:30:12,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:12,555 INFO L225 Difference]: With dead ends: 110 [2022-03-18 00:30:12,555 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 00:30:12,556 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3713, Invalid=5793, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 00:30:12,556 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:12,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 54 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:12,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 00:30:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-18 00:30:12,562 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) [2022-03-18 00:30:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-03-18 00:30:12,562 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 99 [2022-03-18 00:30:12,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:12,562 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-03-18 00:30:12,563 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) [2022-03-18 00:30:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-03-18 00:30:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 00:30:12,563 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:12,563 INFO L500 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:12,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-18 00:30:12,775 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 [2022-03-18 00:30:12,775 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:12,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:12,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1153906541, now seen corresponding path program 87 times [2022-03-18 00:30:12,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:12,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902170569] [2022-03-18 00:30:12,985 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:12,985 INFO L85 PathProgramCache]: Analyzing trace with hash 200827661, now seen corresponding path program 1 times [2022-03-18 00:30:12,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:12,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846942930] [2022-03-18 00:30:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:12,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:12,988 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:12,990 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:12,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1153906541, now seen corresponding path program 88 times [2022-03-18 00:30:12,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:12,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183423803] [2022-03-18 00:30:12,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:12,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:13,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:13,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:13,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183423803] [2022-03-18 00:30:13,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183423803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584275722] [2022-03-18 00:30:13,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:30:13,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:13,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:13,739 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) [2022-03-18 00:30:13,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-18 00:30:13,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:30:13,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:13,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 00:30:13,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:13,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:14,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584275722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:14,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:14,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 54 [2022-03-18 00:30:14,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:14,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902170569] [2022-03-18 00:30:14,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902170569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:14,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:14,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-18 00:30:14,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905941536] [2022-03-18 00:30:14,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:14,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 00:30:14,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 00:30:14,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:30:14,297 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) [2022-03-18 00:30:15,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:15,203 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-03-18 00:30:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 00:30:15,204 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 [2022-03-18 00:30:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:15,204 INFO L225 Difference]: With dead ends: 112 [2022-03-18 00:30:15,204 INFO L226 Difference]: Without dead ends: 105 [2022-03-18 00:30:15,206 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3766, Invalid=5936, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 00:30:15,206 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:15,206 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 39 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:15,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-18 00:30:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-03-18 00:30:15,211 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) [2022-03-18 00:30:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-03-18 00:30:15,212 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 101 [2022-03-18 00:30:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:15,212 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-03-18 00:30:15,212 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) [2022-03-18 00:30:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-03-18 00:30:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 00:30:15,212 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:15,213 INFO L500 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:15,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-18 00:30:15,426 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 [2022-03-18 00:30:15,427 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:15,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:15,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1613324854, now seen corresponding path program 89 times [2022-03-18 00:30:15,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:15,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [434162451] [2022-03-18 00:30:15,616 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:15,617 INFO L85 PathProgramCache]: Analyzing trace with hash 259933005, now seen corresponding path program 1 times [2022-03-18 00:30:15,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:15,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176983062] [2022-03-18 00:30:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:15,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:15,619 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:15,621 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:15,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1613324854, now seen corresponding path program 90 times [2022-03-18 00:30:15,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:15,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42342392] [2022-03-18 00:30:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:15,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:16,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:16,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:16,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42342392] [2022-03-18 00:30:16,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42342392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:16,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870054892] [2022-03-18 00:30:16,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:30:16,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:16,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:16,371 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) [2022-03-18 00:30:16,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-18 00:30:16,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:30:16,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:16,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:30:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-03-18 00:30:16,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 135 proven. 1 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-03-18 00:30:16,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870054892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:16,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:16,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 53 [2022-03-18 00:30:16,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:16,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [434162451] [2022-03-18 00:30:16,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [434162451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:16,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:16,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 00:30:16,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378378210] [2022-03-18 00:30:16,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:16,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 00:30:16,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:16,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 00:30:16,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 00:30:16,715 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) [2022-03-18 00:30:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:17,694 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2022-03-18 00:30:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 00:30:17,694 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 [2022-03-18 00:30:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:17,695 INFO L225 Difference]: With dead ends: 114 [2022-03-18 00:30:17,695 INFO L226 Difference]: Without dead ends: 107 [2022-03-18 00:30:17,696 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3766, Invalid=5936, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 00:30:17,696 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 29 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 [2022-03-18 00:30:17,696 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 29 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-18 00:30:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-03-18 00:30:17,701 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) [2022-03-18 00:30:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2022-03-18 00:30:17,701 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 103 [2022-03-18 00:30:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:17,702 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2022-03-18 00:30:17,702 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) [2022-03-18 00:30:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2022-03-18 00:30:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 00:30:17,702 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:17,702 INFO L500 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:17,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:17,903 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 [2022-03-18 00:30:17,903 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:17,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:17,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1957028071, now seen corresponding path program 91 times [2022-03-18 00:30:17,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:17,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [530999201] [2022-03-18 00:30:18,062 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash 319038349, now seen corresponding path program 1 times [2022-03-18 00:30:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:18,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577301045] [2022-03-18 00:30:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:18,065 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:18,068 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:18,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1957028071, now seen corresponding path program 92 times [2022-03-18 00:30:18,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:18,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291670884] [2022-03-18 00:30:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:18,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:18,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:18,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291670884] [2022-03-18 00:30:18,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291670884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:18,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393241572] [2022-03-18 00:30:18,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:18,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:18,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:18,872 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) [2022-03-18 00:30:18,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-18 00:30:18,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:18,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:18,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 00:30:18,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:19,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:19,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393241572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:19,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:19,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 54 [2022-03-18 00:30:19,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:19,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [530999201] [2022-03-18 00:30:19,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [530999201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:19,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:19,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-18 00:30:19,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701250784] [2022-03-18 00:30:19,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:19,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 00:30:19,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 00:30:19,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:30:19,371 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) [2022-03-18 00:30:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:20,333 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-03-18 00:30:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 00:30:20,333 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 [2022-03-18 00:30:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:20,334 INFO L225 Difference]: With dead ends: 116 [2022-03-18 00:30:20,334 INFO L226 Difference]: Without dead ends: 109 [2022-03-18 00:30:20,335 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3872, Invalid=6228, Unknown=0, NotChecked=0, Total=10100 [2022-03-18 00:30:20,336 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:20,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 34 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-18 00:30:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-18 00:30:20,341 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) [2022-03-18 00:30:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-03-18 00:30:20,341 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 105 [2022-03-18 00:30:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:20,342 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-03-18 00:30:20,342 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) [2022-03-18 00:30:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-03-18 00:30:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 00:30:20,342 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:20,342 INFO L500 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:20,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-18 00:30:20,555 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 [2022-03-18 00:30:20,555 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:20,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1387319492, now seen corresponding path program 93 times [2022-03-18 00:30:20,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:20,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1939641732] [2022-03-18 00:30:20,756 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash 378143693, now seen corresponding path program 1 times [2022-03-18 00:30:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:20,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961589443] [2022-03-18 00:30:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:20,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:20,758 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:20,761 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:20,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1387319492, now seen corresponding path program 94 times [2022-03-18 00:30:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:20,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651397726] [2022-03-18 00:30:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:20,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:21,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:21,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:21,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651397726] [2022-03-18 00:30:21,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651397726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:21,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177674286] [2022-03-18 00:30:21,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:30:21,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:21,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:21,557 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) [2022-03-18 00:30:21,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-18 00:30:21,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:30:21,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:21,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 00:30:21,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:21,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:22,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177674286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:22,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:22,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 54 [2022-03-18 00:30:22,023 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1939641732] [2022-03-18 00:30:22,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1939641732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:22,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:22,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-18 00:30:22,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175853285] [2022-03-18 00:30:22,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:22,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 00:30:22,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 00:30:22,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:30:22,024 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) [2022-03-18 00:30:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:23,116 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-03-18 00:30:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 00:30:23,116 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 [2022-03-18 00:30:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:23,117 INFO L225 Difference]: With dead ends: 118 [2022-03-18 00:30:23,117 INFO L226 Difference]: Without dead ends: 111 [2022-03-18 00:30:23,117 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3925, Invalid=6377, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 00:30:23,118 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:23,118 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 34 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-18 00:30:23,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-18 00:30:23,122 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) [2022-03-18 00:30:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-03-18 00:30:23,123 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2022-03-18 00:30:23,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:23,123 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-03-18 00:30:23,123 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) [2022-03-18 00:30:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-03-18 00:30:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 00:30:23,124 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:23,124 INFO L500 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:23,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:23,339 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 [2022-03-18 00:30:23,339 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash -641778335, now seen corresponding path program 95 times [2022-03-18 00:30:23,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:23,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1057426868] [2022-03-18 00:30:23,497 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash 437249037, now seen corresponding path program 1 times [2022-03-18 00:30:23,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:23,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737862903] [2022-03-18 00:30:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:23,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:23,500 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:23,501 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:23,502 INFO L85 PathProgramCache]: Analyzing trace with hash -641778335, now seen corresponding path program 96 times [2022-03-18 00:30:23,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:23,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109695147] [2022-03-18 00:30:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:23,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:24,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:24,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:24,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109695147] [2022-03-18 00:30:24,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109695147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:24,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078578765] [2022-03-18 00:30:24,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:30:24,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:24,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:24,367 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) [2022-03-18 00:30:24,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-18 00:30:24,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:30:24,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 00:30:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 1 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-03-18 00:30:24,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 144 proven. 1 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-03-18 00:30:24,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078578765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:24,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:24,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 4, 4] total 56 [2022-03-18 00:30:24,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:24,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1057426868] [2022-03-18 00:30:24,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1057426868] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:24,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:24,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-18 00:30:24,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951091853] [2022-03-18 00:30:24,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:24,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-18 00:30:24,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:24,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-18 00:30:24,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 00:30:24,744 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) [2022-03-18 00:30:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:25,822 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2022-03-18 00:30:25,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 00:30:25,822 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 [2022-03-18 00:30:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:25,823 INFO L225 Difference]: With dead ends: 120 [2022-03-18 00:30:25,823 INFO L226 Difference]: Without dead ends: 113 [2022-03-18 00:30:25,824 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4231, Invalid=6689, Unknown=0, NotChecked=0, Total=10920 [2022-03-18 00:30:25,824 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:25,824 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 39 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-18 00:30:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-18 00:30:25,831 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) [2022-03-18 00:30:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-03-18 00:30:25,831 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 109 [2022-03-18 00:30:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:25,831 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-03-18 00:30:25,832 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) [2022-03-18 00:30:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-03-18 00:30:25,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-18 00:30:25,832 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:25,833 INFO L500 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:25,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:26,046 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 [2022-03-18 00:30:26,046 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:26,046 INFO L85 PathProgramCache]: Analyzing trace with hash -689637698, now seen corresponding path program 97 times [2022-03-18 00:30:26,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:26,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1333355702] [2022-03-18 00:30:26,244 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 496354381, now seen corresponding path program 1 times [2022-03-18 00:30:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:26,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470542357] [2022-03-18 00:30:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:26,246 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:26,248 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:26,248 INFO L85 PathProgramCache]: Analyzing trace with hash -689637698, now seen corresponding path program 98 times [2022-03-18 00:30:26,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:26,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920036843] [2022-03-18 00:30:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:26,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:27,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:27,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:27,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920036843] [2022-03-18 00:30:27,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920036843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:27,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563785823] [2022-03-18 00:30:27,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:27,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:27,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:27,100 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) [2022-03-18 00:30:27,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-18 00:30:27,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:27,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:27,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 00:30:27,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:27,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:27,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563785823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:27,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:27,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 54 [2022-03-18 00:30:27,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:27,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1333355702] [2022-03-18 00:30:27,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1333355702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:27,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:27,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 00:30:27,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219317156] [2022-03-18 00:30:27,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:27,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 00:30:27,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:27,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 00:30:27,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:30:27,569 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) [2022-03-18 00:30:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:28,655 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-03-18 00:30:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 00:30:28,655 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 [2022-03-18 00:30:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:28,656 INFO L225 Difference]: With dead ends: 122 [2022-03-18 00:30:28,656 INFO L226 Difference]: Without dead ends: 115 [2022-03-18 00:30:28,657 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:30:28,658 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:28,658 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 29 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-18 00:30:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-18 00:30:28,666 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) [2022-03-18 00:30:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2022-03-18 00:30:28,667 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2022-03-18 00:30:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:28,667 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2022-03-18 00:30:28,667 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) [2022-03-18 00:30:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2022-03-18 00:30:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 00:30:28,668 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:28,668 INFO L500 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:28,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:28,875 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 [2022-03-18 00:30:28,875 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:28,876 INFO L85 PathProgramCache]: Analyzing trace with hash 562154715, now seen corresponding path program 99 times [2022-03-18 00:30:28,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:28,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1022383551] [2022-03-18 00:30:29,081 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:29,081 INFO L85 PathProgramCache]: Analyzing trace with hash 555459725, now seen corresponding path program 1 times [2022-03-18 00:30:29,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:29,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514565348] [2022-03-18 00:30:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:29,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:29,084 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:29,086 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:29,086 INFO L85 PathProgramCache]: Analyzing trace with hash 562154715, now seen corresponding path program 100 times [2022-03-18 00:30:29,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:29,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820124944] [2022-03-18 00:30:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:29,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:30,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:30,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:30,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820124944] [2022-03-18 00:30:30,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820124944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:30,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767840738] [2022-03-18 00:30:30,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:30:30,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:30,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:30,007 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) [2022-03-18 00:30:30,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-18 00:30:30,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:30:30,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 00:30:30,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:30,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:32,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767840738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:32,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:32,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 104 [2022-03-18 00:30:32,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:32,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1022383551] [2022-03-18 00:30:32,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1022383551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:32,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:32,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-18 00:30:32,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180484385] [2022-03-18 00:30:32,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:32,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 00:30:32,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:32,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 00:30:32,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:30:32,645 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 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) [2022-03-18 00:30:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:33,822 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2022-03-18 00:30:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 00:30:33,822 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 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 [2022-03-18 00:30:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:33,823 INFO L225 Difference]: With dead ends: 124 [2022-03-18 00:30:33,823 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 00:30:33,825 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10612, Invalid=13568, Unknown=0, NotChecked=0, Total=24180 [2022-03-18 00:30:33,825 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:33,825 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 23 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 00:30:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-03-18 00:30:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 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) [2022-03-18 00:30:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-03-18 00:30:33,836 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2022-03-18 00:30:33,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:33,836 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-03-18 00:30:33,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 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) [2022-03-18 00:30:33,837 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-03-18 00:30:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 00:30:33,837 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:33,837 INFO L500 BasicCegarLoop]: trace histogram [52, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:33,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-18 00:30:34,038 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 [2022-03-18 00:30:34,038 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:34,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:34,038 INFO L85 PathProgramCache]: Analyzing trace with hash 134474102, now seen corresponding path program 101 times [2022-03-18 00:30:34,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:34,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2006705891] [2022-03-18 00:30:34,283 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash 614565069, now seen corresponding path program 1 times [2022-03-18 00:30:34,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:34,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727713629] [2022-03-18 00:30:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:34,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:34,286 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:34,289 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:34,289 INFO L85 PathProgramCache]: Analyzing trace with hash 134474102, now seen corresponding path program 102 times [2022-03-18 00:30:34,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:34,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90618542] [2022-03-18 00:30:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:34,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:35,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:35,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:35,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90618542] [2022-03-18 00:30:35,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90618542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:35,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121355225] [2022-03-18 00:30:35,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:30:35,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:35,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:35,374 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) [2022-03-18 00:30:35,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-18 00:30:35,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-18 00:30:35,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:35,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 00:30:35,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 250 proven. 4 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 00:30:35,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 250 proven. 4 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 00:30:35,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121355225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:35,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:35,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 5, 5] total 59 [2022-03-18 00:30:35,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:35,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2006705891] [2022-03-18 00:30:35,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2006705891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:35,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:35,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-18 00:30:35,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365384426] [2022-03-18 00:30:35,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:35,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 00:30:35,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:35,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 00:30:35,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 00:30:35,772 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 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) [2022-03-18 00:30:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:36,989 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-03-18 00:30:36,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 00:30:36,990 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 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 [2022-03-18 00:30:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:36,992 INFO L225 Difference]: With dead ends: 124 [2022-03-18 00:30:36,992 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 00:30:36,993 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4782, Invalid=7650, Unknown=0, NotChecked=0, Total=12432 [2022-03-18 00:30:36,994 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:36,994 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 28 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 00:30:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-03-18 00:30:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 113 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) [2022-03-18 00:30:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-03-18 00:30:36,999 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 115 [2022-03-18 00:30:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:36,999 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-03-18 00:30:36,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 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) [2022-03-18 00:30:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-03-18 00:30:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 00:30:37,000 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:37,000 INFO L500 BasicCegarLoop]: trace histogram [53, 50, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:37,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:37,217 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 [2022-03-18 00:30:37,218 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:37,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:37,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1450265425, now seen corresponding path program 103 times [2022-03-18 00:30:37,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:37,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [770892959] [2022-03-18 00:30:37,445 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash 673670413, now seen corresponding path program 1 times [2022-03-18 00:30:37,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:37,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106240700] [2022-03-18 00:30:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:37,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:37,448 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:37,451 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:37,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1450265425, now seen corresponding path program 104 times [2022-03-18 00:30:37,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:37,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913955107] [2022-03-18 00:30:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:37,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:38,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:38,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:38,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913955107] [2022-03-18 00:30:38,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913955107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:38,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279264465] [2022-03-18 00:30:38,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:38,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:38,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:38,466 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) [2022-03-18 00:30:38,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-18 00:30:38,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:38,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 00:30:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:38,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:41,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279264465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:41,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:41,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 104 [2022-03-18 00:30:41,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [770892959] [2022-03-18 00:30:41,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [770892959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:41,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:41,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-18 00:30:41,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110611647] [2022-03-18 00:30:41,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:41,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 00:30:41,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:41,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 00:30:41,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:30:41,038 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 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) [2022-03-18 00:30:42,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:42,291 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2022-03-18 00:30:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 00:30:42,291 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 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 [2022-03-18 00:30:42,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:42,292 INFO L225 Difference]: With dead ends: 126 [2022-03-18 00:30:42,292 INFO L226 Difference]: Without dead ends: 121 [2022-03-18 00:30:42,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10818, Invalid=13988, Unknown=0, NotChecked=0, Total=24806 [2022-03-18 00:30:42,295 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 116 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:42,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 33 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-18 00:30:42,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-03-18 00:30:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 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) [2022-03-18 00:30:42,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-03-18 00:30:42,308 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 117 [2022-03-18 00:30:42,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:42,308 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-03-18 00:30:42,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 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) [2022-03-18 00:30:42,309 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-03-18 00:30:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-18 00:30:42,309 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:42,309 INFO L500 BasicCegarLoop]: trace histogram [54, 50, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:42,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-18 00:30:42,522 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 [2022-03-18 00:30:42,523 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1089625492, now seen corresponding path program 105 times [2022-03-18 00:30:42,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:42,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [765052205] [2022-03-18 00:30:42,773 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash 732775757, now seen corresponding path program 1 times [2022-03-18 00:30:42,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:42,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325122269] [2022-03-18 00:30:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:42,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:42,776 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:42,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1089625492, now seen corresponding path program 106 times [2022-03-18 00:30:42,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:42,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793401192] [2022-03-18 00:30:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:42,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:43,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:43,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:43,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793401192] [2022-03-18 00:30:43,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793401192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:43,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951790380] [2022-03-18 00:30:43,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:30:43,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:43,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:43,830 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) [2022-03-18 00:30:43,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-18 00:30:43,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:30:43,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:43,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 00:30:43,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:44,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:46,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951790380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:46,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:46,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 104 [2022-03-18 00:30:46,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:46,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [765052205] [2022-03-18 00:30:46,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [765052205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:46,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:46,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-18 00:30:46,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192204112] [2022-03-18 00:30:46,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:46,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-18 00:30:46,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:46,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-18 00:30:46,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:30:46,393 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 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) [2022-03-18 00:30:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:47,692 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2022-03-18 00:30:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 00:30:47,692 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 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 [2022-03-18 00:30:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:47,693 INFO L225 Difference]: With dead ends: 128 [2022-03-18 00:30:47,693 INFO L226 Difference]: Without dead ends: 123 [2022-03-18 00:30:47,694 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10921, Invalid=14201, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 00:30:47,694 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:47,694 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 48 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-18 00:30:47,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-03-18 00:30:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0512820512820513) internal successors, (123), 117 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) [2022-03-18 00:30:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2022-03-18 00:30:47,700 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 119 [2022-03-18 00:30:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:47,700 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2022-03-18 00:30:47,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 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) [2022-03-18 00:30:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2022-03-18 00:30:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 00:30:47,701 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:47,701 INFO L500 BasicCegarLoop]: trace histogram [55, 50, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:47,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:47,907 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 [2022-03-18 00:30:47,907 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:47,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1911594695, now seen corresponding path program 107 times [2022-03-18 00:30:47,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:47,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1453175121] [2022-03-18 00:30:48,114 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash 791881101, now seen corresponding path program 1 times [2022-03-18 00:30:48,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:48,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780196538] [2022-03-18 00:30:48,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:48,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:48,117 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:48,119 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:48,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1911594695, now seen corresponding path program 108 times [2022-03-18 00:30:48,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:48,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006546233] [2022-03-18 00:30:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:48,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:49,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:49,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:49,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006546233] [2022-03-18 00:30:49,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006546233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:49,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656622606] [2022-03-18 00:30:49,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:30:49,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:49,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:49,196 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) [2022-03-18 00:30:49,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-18 00:30:49,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-03-18 00:30:49,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:49,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 00:30:49,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 550 proven. 25 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 00:30:49,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 550 proven. 25 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 00:30:49,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656622606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:49,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:49,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 8, 8] total 65 [2022-03-18 00:30:49,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:49,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1453175121] [2022-03-18 00:30:49,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1453175121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:49,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:49,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-18 00:30:49,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976626265] [2022-03-18 00:30:49,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:49,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 00:30:49,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:49,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 00:30:49,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-03-18 00:30:49,731 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 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) [2022-03-18 00:30:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:51,089 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-03-18 00:30:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 00:30:51,089 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 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 [2022-03-18 00:30:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:51,090 INFO L225 Difference]: With dead ends: 130 [2022-03-18 00:30:51,090 INFO L226 Difference]: Without dead ends: 125 [2022-03-18 00:30:51,091 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5658, Invalid=8862, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 00:30:51,091 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:51,091 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 48 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:30:51,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-18 00:30:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-03-18 00:30:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0588235294117647) internal successors, (126), 119 states have internal predecessors, (126), 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) [2022-03-18 00:30:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2022-03-18 00:30:51,097 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 121 [2022-03-18 00:30:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:51,097 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2022-03-18 00:30:51,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 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) [2022-03-18 00:30:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2022-03-18 00:30:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-18 00:30:51,098 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:51,098 INFO L500 BasicCegarLoop]: trace histogram [56, 50, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:51,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-18 00:30:51,298 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 [2022-03-18 00:30:51,298 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:51,299 INFO L85 PathProgramCache]: Analyzing trace with hash -133828510, now seen corresponding path program 109 times [2022-03-18 00:30:51,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:51,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386325204] [2022-03-18 00:30:51,448 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:51,449 INFO L85 PathProgramCache]: Analyzing trace with hash 850986445, now seen corresponding path program 1 times [2022-03-18 00:30:51,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:51,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394466140] [2022-03-18 00:30:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:51,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:51,451 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:51,453 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:51,453 INFO L85 PathProgramCache]: Analyzing trace with hash -133828510, now seen corresponding path program 110 times [2022-03-18 00:30:51,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:51,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153734719] [2022-03-18 00:30:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:51,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:52,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:52,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153734719] [2022-03-18 00:30:52,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153734719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:52,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325112607] [2022-03-18 00:30:52,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:52,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:52,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:52,625 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) [2022-03-18 00:30:52,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-18 00:30:52,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:52,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:52,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-18 00:30:52,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:52,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:55,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325112607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:55,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:55,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 104 [2022-03-18 00:30:55,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:55,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386325204] [2022-03-18 00:30:55,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386325204] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:55,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:55,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-18 00:30:55,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937119868] [2022-03-18 00:30:55,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:55,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-18 00:30:55,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:55,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-18 00:30:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:30:55,107 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 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) [2022-03-18 00:30:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:56,513 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2022-03-18 00:30:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-18 00:30:56,514 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 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 [2022-03-18 00:30:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:56,516 INFO L225 Difference]: With dead ends: 132 [2022-03-18 00:30:56,516 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 00:30:56,518 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11127, Invalid=14633, Unknown=0, NotChecked=0, Total=25760 [2022-03-18 00:30:56,518 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 122 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:56,518 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 48 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:30:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 00:30:56,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-03-18 00:30:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 121 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) [2022-03-18 00:30:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 133 transitions. [2022-03-18 00:30:56,525 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 133 transitions. Word has length 123 [2022-03-18 00:30:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:56,525 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 133 transitions. [2022-03-18 00:30:56,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 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) [2022-03-18 00:30:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 133 transitions. [2022-03-18 00:30:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-18 00:30:56,526 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:56,526 INFO L500 BasicCegarLoop]: trace histogram [57, 50, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:56,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:56,751 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 [2022-03-18 00:30:56,751 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:56,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:56,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1309493053, now seen corresponding path program 111 times [2022-03-18 00:30:56,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:56,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1960333762] [2022-03-18 00:30:56,954 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:30:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash 910091789, now seen corresponding path program 1 times [2022-03-18 00:30:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:56,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312780865] [2022-03-18 00:30:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:56,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:56,957 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:30:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:30:56,959 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:30:56,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1309493053, now seen corresponding path program 112 times [2022-03-18 00:30:56,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:56,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686343458] [2022-03-18 00:30:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:58,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:58,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:58,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686343458] [2022-03-18 00:30:58,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686343458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:58,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661662332] [2022-03-18 00:30:58,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:30:58,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:58,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:58,172 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) [2022-03-18 00:30:58,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-18 00:30:58,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:30:58,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 00:30:58,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:58,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:00,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661662332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:00,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:00,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 104 [2022-03-18 00:31:00,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:00,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1960333762] [2022-03-18 00:31:00,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1960333762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:00,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:00,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-18 00:31:00,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749085215] [2022-03-18 00:31:00,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:00,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-18 00:31:00,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-18 00:31:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:31:00,683 INFO L87 Difference]: Start difference. First operand 126 states and 133 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 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) [2022-03-18 00:31:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:02,162 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2022-03-18 00:31:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 00:31:02,163 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 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 [2022-03-18 00:31:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:02,163 INFO L225 Difference]: With dead ends: 134 [2022-03-18 00:31:02,163 INFO L226 Difference]: Without dead ends: 129 [2022-03-18 00:31:02,164 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11230, Invalid=14852, Unknown=0, NotChecked=0, Total=26082 [2022-03-18 00:31:02,164 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 124 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:02,164 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 33 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:31:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-18 00:31:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-03-18 00:31:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.0731707317073171) internal successors, (132), 123 states have internal predecessors, (132), 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) [2022-03-18 00:31:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2022-03-18 00:31:02,171 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 125 [2022-03-18 00:31:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:02,172 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2022-03-18 00:31:02,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 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) [2022-03-18 00:31:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2022-03-18 00:31:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 00:31:02,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:02,172 INFO L500 BasicCegarLoop]: trace histogram [58, 50, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:02,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-18 00:31:02,391 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 [2022-03-18 00:31:02,391 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:02,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1067078488, now seen corresponding path program 113 times [2022-03-18 00:31:02,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:02,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1973118013] [2022-03-18 00:31:02,578 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:31:02,578 INFO L85 PathProgramCache]: Analyzing trace with hash 969197133, now seen corresponding path program 1 times [2022-03-18 00:31:02,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:02,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467594525] [2022-03-18 00:31:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:02,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:02,580 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:31:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:02,582 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:31:02,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1067078488, now seen corresponding path program 114 times [2022-03-18 00:31:02,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:02,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836943844] [2022-03-18 00:31:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:02,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:03,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:03,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:03,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836943844] [2022-03-18 00:31:03,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836943844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:03,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628444928] [2022-03-18 00:31:03,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:31:03,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:03,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:03,805 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) [2022-03-18 00:31:03,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-18 00:31:03,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2022-03-18 00:31:03,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:03,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 00:31:03,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 850 proven. 64 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 00:31:04,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 850 proven. 64 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 00:31:04,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628444928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:04,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:04,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 11, 11] total 71 [2022-03-18 00:31:04,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:04,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1973118013] [2022-03-18 00:31:04,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1973118013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:04,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:04,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-18 00:31:04,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22259595] [2022-03-18 00:31:04,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:04,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-18 00:31:04,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:04,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-18 00:31:04,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 00:31:04,492 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 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) [2022-03-18 00:31:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:06,006 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2022-03-18 00:31:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-18 00:31:06,006 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 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 [2022-03-18 00:31:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:06,007 INFO L225 Difference]: With dead ends: 136 [2022-03-18 00:31:06,007 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 00:31:06,008 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6606, Invalid=10164, Unknown=0, NotChecked=0, Total=16770 [2022-03-18 00:31:06,008 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:06,009 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 38 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:31:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 00:31:06,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-03-18 00:31:06,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.08) internal successors, (135), 125 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) [2022-03-18 00:31:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2022-03-18 00:31:06,015 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 127 [2022-03-18 00:31:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:06,016 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2022-03-18 00:31:06,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 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) [2022-03-18 00:31:06,016 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2022-03-18 00:31:06,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-18 00:31:06,016 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:06,016 INFO L500 BasicCegarLoop]: trace histogram [59, 50, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:06,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-18 00:31:06,231 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 [2022-03-18 00:31:06,231 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash 34915507, now seen corresponding path program 115 times [2022-03-18 00:31:06,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:06,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2077396777] [2022-03-18 00:31:06,437 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:31:06,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1028302477, now seen corresponding path program 1 times [2022-03-18 00:31:06,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:06,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528063705] [2022-03-18 00:31:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:06,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:06,440 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:31:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:06,442 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:31:06,442 INFO L85 PathProgramCache]: Analyzing trace with hash 34915507, now seen corresponding path program 116 times [2022-03-18 00:31:06,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:06,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398595102] [2022-03-18 00:31:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:06,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:07,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:07,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:07,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398595102] [2022-03-18 00:31:07,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398595102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:07,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515980657] [2022-03-18 00:31:07,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:31:07,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:07,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:07,696 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) [2022-03-18 00:31:07,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-18 00:31:07,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:31:07,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:07,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 00:31:07,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:07,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:10,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515980657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:10,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:10,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 104 [2022-03-18 00:31:10,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:10,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2077396777] [2022-03-18 00:31:10,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2077396777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:10,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:10,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-18 00:31:10,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366876377] [2022-03-18 00:31:10,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:10,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 00:31:10,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 00:31:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:31:10,149 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 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) [2022-03-18 00:31:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:11,759 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2022-03-18 00:31:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 00:31:11,759 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 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 [2022-03-18 00:31:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:11,760 INFO L225 Difference]: With dead ends: 138 [2022-03-18 00:31:11,760 INFO L226 Difference]: Without dead ends: 133 [2022-03-18 00:31:11,761 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11436, Invalid=15296, Unknown=0, NotChecked=0, Total=26732 [2022-03-18 00:31:11,761 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 128 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:11,761 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 28 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:31:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-18 00:31:11,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-03-18 00:31:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 127 states have internal predecessors, (138), 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) [2022-03-18 00:31:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2022-03-18 00:31:11,766 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 129 [2022-03-18 00:31:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:11,766 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2022-03-18 00:31:11,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 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) [2022-03-18 00:31:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2022-03-18 00:31:11,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 00:31:11,766 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:11,766 INFO L500 BasicCegarLoop]: trace histogram [60, 50, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:11,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-18 00:31:11,967 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 [2022-03-18 00:31:11,967 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash 263736142, now seen corresponding path program 117 times [2022-03-18 00:31:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:11,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611225284] [2022-03-18 00:31:12,170 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:31:12,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1087407821, now seen corresponding path program 1 times [2022-03-18 00:31:12,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:12,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707481044] [2022-03-18 00:31:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:12,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:12,172 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:31:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:12,174 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:31:12,175 INFO L85 PathProgramCache]: Analyzing trace with hash 263736142, now seen corresponding path program 118 times [2022-03-18 00:31:12,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:12,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986027234] [2022-03-18 00:31:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:12,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:13,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:13,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:13,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986027234] [2022-03-18 00:31:13,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986027234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:13,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815808432] [2022-03-18 00:31:13,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:31:13,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:13,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:13,413 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) [2022-03-18 00:31:13,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-18 00:31:13,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:31:13,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:13,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-18 00:31:13,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:13,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:15,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815808432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:15,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:15,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 104 [2022-03-18 00:31:15,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [611225284] [2022-03-18 00:31:15,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [611225284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:15,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:15,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-18 00:31:15,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54168768] [2022-03-18 00:31:15,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:15,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-18 00:31:15,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-18 00:31:15,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:31:15,804 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 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) [2022-03-18 00:31:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:17,414 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2022-03-18 00:31:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-18 00:31:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 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 [2022-03-18 00:31:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:17,416 INFO L225 Difference]: With dead ends: 140 [2022-03-18 00:31:17,416 INFO L226 Difference]: Without dead ends: 135 [2022-03-18 00:31:17,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11539, Invalid=15521, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 00:31:17,418 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:17,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 28 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:31:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-18 00:31:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-03-18 00:31:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0930232558139534) internal successors, (141), 129 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) [2022-03-18 00:31:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2022-03-18 00:31:17,422 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 131 [2022-03-18 00:31:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:17,423 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2022-03-18 00:31:17,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 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) [2022-03-18 00:31:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2022-03-18 00:31:17,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-18 00:31:17,423 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:17,424 INFO L500 BasicCegarLoop]: trace histogram [61, 50, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:17,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-18 00:31:17,639 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 [2022-03-18 00:31:17,639 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:17,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1117034281, now seen corresponding path program 119 times [2022-03-18 00:31:17,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:17,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1471529619] [2022-03-18 00:31:17,811 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:31:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1146513165, now seen corresponding path program 1 times [2022-03-18 00:31:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:17,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105336049] [2022-03-18 00:31:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:17,813 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:31:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:17,815 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:31:17,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1117034281, now seen corresponding path program 120 times [2022-03-18 00:31:17,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:17,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825553516] [2022-03-18 00:31:17,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:17,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:19,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:19,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:19,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825553516] [2022-03-18 00:31:19,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825553516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:19,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764702376] [2022-03-18 00:31:19,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:31:19,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:19,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:19,080 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) [2022-03-18 00:31:19,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-18 00:31:19,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2022-03-18 00:31:19,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:19,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 00:31:19,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1150 proven. 121 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 00:31:19,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1150 proven. 121 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 00:31:19,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764702376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:19,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:19,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 14, 14] total 77 [2022-03-18 00:31:19,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:19,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1471529619] [2022-03-18 00:31:19,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1471529619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:19,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:19,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-18 00:31:19,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871152916] [2022-03-18 00:31:19,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:19,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-18 00:31:19,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:19,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-18 00:31:19,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-03-18 00:31:19,936 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 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) [2022-03-18 00:31:21,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:21,573 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2022-03-18 00:31:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 00:31:21,573 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 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 [2022-03-18 00:31:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:21,574 INFO L225 Difference]: With dead ends: 142 [2022-03-18 00:31:21,574 INFO L226 Difference]: Without dead ends: 137 [2022-03-18 00:31:21,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7626, Invalid=11556, Unknown=0, NotChecked=0, Total=19182 [2022-03-18 00:31:21,575 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 132 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:21,575 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 53 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:31:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-18 00:31:21,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-03-18 00:31:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.099236641221374) internal successors, (144), 131 states have internal predecessors, (144), 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) [2022-03-18 00:31:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2022-03-18 00:31:21,582 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 133 [2022-03-18 00:31:21,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:21,582 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2022-03-18 00:31:21,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 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) [2022-03-18 00:31:21,582 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2022-03-18 00:31:21,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 00:31:21,582 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:21,583 INFO L500 BasicCegarLoop]: trace histogram [62, 50, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:21,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:21,783 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 [2022-03-18 00:31:21,784 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash 797792324, now seen corresponding path program 121 times [2022-03-18 00:31:21,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:21,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1632015400] [2022-03-18 00:31:21,970 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:31:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1205618509, now seen corresponding path program 1 times [2022-03-18 00:31:21,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:21,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365405497] [2022-03-18 00:31:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:21,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:21,973 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:31:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:21,974 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:31:21,975 INFO L85 PathProgramCache]: Analyzing trace with hash 797792324, now seen corresponding path program 122 times [2022-03-18 00:31:21,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:21,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110287625] [2022-03-18 00:31:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:21,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:23,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:23,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:23,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110287625] [2022-03-18 00:31:23,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110287625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:23,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904260309] [2022-03-18 00:31:23,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:31:23,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:23,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:23,272 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) [2022-03-18 00:31:23,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-18 00:31:23,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:31:23,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:23,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-18 00:31:23,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:23,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:25,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904260309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:25,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:25,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 104 [2022-03-18 00:31:25,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:25,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1632015400] [2022-03-18 00:31:25,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1632015400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:25,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:25,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-18 00:31:25,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697639600] [2022-03-18 00:31:25,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:25,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-18 00:31:25,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-18 00:31:25,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:31:25,594 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 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) [2022-03-18 00:31:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:27,326 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2022-03-18 00:31:27,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-18 00:31:27,326 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 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 [2022-03-18 00:31:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:27,327 INFO L225 Difference]: With dead ends: 144 [2022-03-18 00:31:27,327 INFO L226 Difference]: Without dead ends: 139 [2022-03-18 00:31:27,329 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11745, Invalid=15977, Unknown=0, NotChecked=0, Total=27722 [2022-03-18 00:31:27,329 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 134 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:27,329 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 33 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:31:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-18 00:31:27,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-03-18 00:31:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.105263157894737) internal successors, (147), 133 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) [2022-03-18 00:31:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 151 transitions. [2022-03-18 00:31:27,342 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 151 transitions. Word has length 135 [2022-03-18 00:31:27,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:27,343 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 151 transitions. [2022-03-18 00:31:27,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 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) [2022-03-18 00:31:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 151 transitions. [2022-03-18 00:31:27,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 00:31:27,344 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:27,344 INFO L500 BasicCegarLoop]: trace histogram [63, 50, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:27,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:27,551 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 [2022-03-18 00:31:27,551 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:27,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1051050337, now seen corresponding path program 123 times [2022-03-18 00:31:27,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:27,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1618104148] [2022-03-18 00:31:27,736 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:31:27,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1264723853, now seen corresponding path program 1 times [2022-03-18 00:31:27,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:27,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70581487] [2022-03-18 00:31:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:27,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:27,739 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:31:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:27,741 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:31:27,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1051050337, now seen corresponding path program 124 times [2022-03-18 00:31:27,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:27,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937571605] [2022-03-18 00:31:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:27,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:29,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:29,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:29,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937571605] [2022-03-18 00:31:29,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937571605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:29,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938231686] [2022-03-18 00:31:29,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:31:29,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:29,081 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) [2022-03-18 00:31:29,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-18 00:31:29,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:31:29,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 00:31:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:29,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:31,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938231686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:31,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:31,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 104 [2022-03-18 00:31:31,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:31,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1618104148] [2022-03-18 00:31:31,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1618104148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:31,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:31,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-18 00:31:31,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023176992] [2022-03-18 00:31:31,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:31,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 00:31:31,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:31,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 00:31:31,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:31:31,395 INFO L87 Difference]: Start difference. First operand 138 states and 151 transitions. Second operand has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 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) [2022-03-18 00:31:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:33,178 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-03-18 00:31:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 00:31:33,179 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 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 [2022-03-18 00:31:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:33,179 INFO L225 Difference]: With dead ends: 146 [2022-03-18 00:31:33,179 INFO L226 Difference]: Without dead ends: 141 [2022-03-18 00:31:33,180 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=11848, Invalid=16208, Unknown=0, NotChecked=0, Total=28056 [2022-03-18 00:31:33,181 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 136 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:33,181 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 53 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:31:33,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-18 00:31:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-03-18 00:31:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 135 states have internal predecessors, (150), 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) [2022-03-18 00:31:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2022-03-18 00:31:33,186 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 137 [2022-03-18 00:31:33,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:33,187 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2022-03-18 00:31:33,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 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) [2022-03-18 00:31:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2022-03-18 00:31:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-18 00:31:33,187 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:33,187 INFO L500 BasicCegarLoop]: trace histogram [64, 50, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:33,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-18 00:31:33,388 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 [2022-03-18 00:31:33,388 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:33,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:33,388 INFO L85 PathProgramCache]: Analyzing trace with hash 327612986, now seen corresponding path program 125 times [2022-03-18 00:31:33,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:33,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1521952839] [2022-03-18 00:31:33,602 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:31:33,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1323829197, now seen corresponding path program 1 times [2022-03-18 00:31:33,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:33,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816536649] [2022-03-18 00:31:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:33,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:33,605 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:31:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:33,607 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:31:33,607 INFO L85 PathProgramCache]: Analyzing trace with hash 327612986, now seen corresponding path program 126 times [2022-03-18 00:31:33,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:33,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261690568] [2022-03-18 00:31:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:33,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:34,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:34,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:34,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261690568] [2022-03-18 00:31:34,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261690568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:34,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043810699] [2022-03-18 00:31:34,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:31:34,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:34,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:34,986 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) [2022-03-18 00:31:34,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-18 00:31:35,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2022-03-18 00:31:35,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 00:31:35,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 196 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 00:31:35,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 196 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-03-18 00:31:36,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043810699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:36,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:36,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 17, 17] total 83 [2022-03-18 00:31:36,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1521952839] [2022-03-18 00:31:36,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1521952839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:36,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:36,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-18 00:31:36,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978754366] [2022-03-18 00:31:36,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:36,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-18 00:31:36,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:36,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-18 00:31:36,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-03-18 00:31:36,089 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 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) [2022-03-18 00:31:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:37,943 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2022-03-18 00:31:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 00:31:37,943 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 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 [2022-03-18 00:31:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:37,944 INFO L225 Difference]: With dead ends: 148 [2022-03-18 00:31:37,944 INFO L226 Difference]: Without dead ends: 143 [2022-03-18 00:31:37,945 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8718, Invalid=13038, Unknown=0, NotChecked=0, Total=21756 [2022-03-18 00:31:37,945 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 138 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:37,946 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 48 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:31:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-18 00:31:37,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-03-18 00:31:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.1167883211678833) internal successors, (153), 137 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) [2022-03-18 00:31:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 157 transitions. [2022-03-18 00:31:37,953 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 157 transitions. Word has length 139 [2022-03-18 00:31:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:37,953 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 157 transitions. [2022-03-18 00:31:37,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 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) [2022-03-18 00:31:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 157 transitions. [2022-03-18 00:31:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-18 00:31:37,954 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:37,954 INFO L500 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:37,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:38,154 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 [2022-03-18 00:31:38,155 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:38,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1921828075, now seen corresponding path program 127 times [2022-03-18 00:31:38,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:38,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [648202687] [2022-03-18 00:31:38,368 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:31:38,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1382934541, now seen corresponding path program 1 times [2022-03-18 00:31:38,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:38,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819461506] [2022-03-18 00:31:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:38,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:38,372 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:31:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:38,374 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:31:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1921828075, now seen corresponding path program 128 times [2022-03-18 00:31:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:38,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417880879] [2022-03-18 00:31:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:39,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:39,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:39,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417880879] [2022-03-18 00:31:39,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417880879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:39,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247126812] [2022-03-18 00:31:39,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:31:39,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:39,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:39,809 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) [2022-03-18 00:31:39,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-18 00:31:39,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:31:39,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:39,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 00:31:39,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:40,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:42,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247126812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:42,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:42,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 104 [2022-03-18 00:31:42,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:42,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [648202687] [2022-03-18 00:31:42,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [648202687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:42,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:42,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-18 00:31:42,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360199798] [2022-03-18 00:31:42,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:42,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-18 00:31:42,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-18 00:31:42,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:31:42,041 INFO L87 Difference]: Start difference. First operand 142 states and 157 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 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) [2022-03-18 00:31:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:43,912 INFO L93 Difference]: Finished difference Result 150 states and 167 transitions. [2022-03-18 00:31:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 00:31:43,912 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 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 [2022-03-18 00:31:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:43,913 INFO L225 Difference]: With dead ends: 150 [2022-03-18 00:31:43,913 INFO L226 Difference]: Without dead ends: 145 [2022-03-18 00:31:43,914 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2506 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12054, Invalid=16676, Unknown=0, NotChecked=0, Total=28730 [2022-03-18 00:31:43,915 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 140 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:43,915 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 38 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:31:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-18 00:31:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-03-18 00:31:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.1223021582733812) internal successors, (156), 139 states have internal predecessors, (156), 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) [2022-03-18 00:31:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 160 transitions. [2022-03-18 00:31:43,923 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 160 transitions. Word has length 141 [2022-03-18 00:31:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:43,923 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 160 transitions. [2022-03-18 00:31:43,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 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) [2022-03-18 00:31:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 160 transitions. [2022-03-18 00:31:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-18 00:31:43,924 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:43,924 INFO L500 BasicCegarLoop]: trace histogram [66, 50, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:43,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:44,139 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 [2022-03-18 00:31:44,139 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:44,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1028829488, now seen corresponding path program 129 times [2022-03-18 00:31:44,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:44,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233916676] [2022-03-18 00:31:44,316 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:31:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1442039885, now seen corresponding path program 1 times [2022-03-18 00:31:44,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:44,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594182839] [2022-03-18 00:31:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:44,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:44,319 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:31:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:44,321 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:31:44,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1028829488, now seen corresponding path program 130 times [2022-03-18 00:31:44,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:44,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127577245] [2022-03-18 00:31:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:44,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:45,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:45,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:45,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127577245] [2022-03-18 00:31:45,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127577245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:45,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906289127] [2022-03-18 00:31:45,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:31:45,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:45,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:45,890 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) [2022-03-18 00:31:45,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-18 00:31:45,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:31:45,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:45,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-18 00:31:45,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:46,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:48,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906289127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:48,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:48,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 104 [2022-03-18 00:31:48,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:48,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233916676] [2022-03-18 00:31:48,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233916676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:48,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:48,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-18 00:31:48,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683385452] [2022-03-18 00:31:48,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:48,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 00:31:48,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:48,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 00:31:48,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:31:48,167 INFO L87 Difference]: Start difference. First operand 144 states and 160 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 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) [2022-03-18 00:31:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:50,095 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2022-03-18 00:31:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-18 00:31:50,096 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 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 [2022-03-18 00:31:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:50,096 INFO L225 Difference]: With dead ends: 152 [2022-03-18 00:31:50,096 INFO L226 Difference]: Without dead ends: 147 [2022-03-18 00:31:50,098 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2573 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12157, Invalid=16913, Unknown=0, NotChecked=0, Total=29070 [2022-03-18 00:31:50,098 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:50,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 38 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:31:50,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-18 00:31:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-03-18 00:31:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.127659574468085) internal successors, (159), 141 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) [2022-03-18 00:31:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 163 transitions. [2022-03-18 00:31:50,107 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 163 transitions. Word has length 143 [2022-03-18 00:31:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:50,107 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 163 transitions. [2022-03-18 00:31:50,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 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) [2022-03-18 00:31:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 163 transitions. [2022-03-18 00:31:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-18 00:31:50,108 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:50,108 INFO L500 BasicCegarLoop]: trace histogram [67, 50, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:50,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-18 00:31:50,319 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 [2022-03-18 00:31:50,319 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1932332171, now seen corresponding path program 131 times [2022-03-18 00:31:50,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:50,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1904136590] [2022-03-18 00:31:50,511 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:31:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1501145229, now seen corresponding path program 1 times [2022-03-18 00:31:50,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:50,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021862526] [2022-03-18 00:31:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:50,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:50,514 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:31:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:50,517 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:31:50,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1932332171, now seen corresponding path program 132 times [2022-03-18 00:31:50,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:50,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342580357] [2022-03-18 00:31:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:50,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:52,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:52,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:52,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342580357] [2022-03-18 00:31:52,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342580357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:52,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971899878] [2022-03-18 00:31:52,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:31:52,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:52,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:52,026 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) [2022-03-18 00:31:52,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-18 00:31:52,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2022-03-18 00:31:52,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:52,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 00:31:52,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 1089 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2022-03-18 00:31:53,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2278 proven. 1089 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2022-03-18 00:31:54,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971899878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:54,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:54,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 36, 36] total 103 [2022-03-18 00:31:54,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:54,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1904136590] [2022-03-18 00:31:54,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1904136590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:54,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:54,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-18 00:31:54,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628798224] [2022-03-18 00:31:54,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:54,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-18 00:31:54,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-18 00:31:54,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:31:54,163 INFO L87 Difference]: Start difference. First operand 146 states and 163 transitions. Second operand has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 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) [2022-03-18 00:31:56,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:56,144 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2022-03-18 00:31:56,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 00:31:56,144 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 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 [2022-03-18 00:31:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:56,145 INFO L225 Difference]: With dead ends: 154 [2022-03-18 00:31:56,145 INFO L226 Difference]: Without dead ends: 149 [2022-03-18 00:31:56,146 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2378 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12157, Invalid=16913, Unknown=0, NotChecked=0, Total=29070 [2022-03-18 00:31:56,148 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:56,148 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 38 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:31:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-18 00:31:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-03-18 00:31:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.132867132867133) internal successors, (162), 143 states have internal predecessors, (162), 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) [2022-03-18 00:31:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2022-03-18 00:31:56,157 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 145 [2022-03-18 00:31:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:56,158 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2022-03-18 00:31:56,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 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) [2022-03-18 00:31:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2022-03-18 00:31:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-18 00:31:56,159 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:56,159 INFO L500 BasicCegarLoop]: trace histogram [68, 50, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:56,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:56,375 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 [2022-03-18 00:31:56,375 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:56,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1679950554, now seen corresponding path program 133 times [2022-03-18 00:31:56,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:56,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1290955105] [2022-03-18 00:31:56,556 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:31:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1560250573, now seen corresponding path program 1 times [2022-03-18 00:31:56,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:56,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209453011] [2022-03-18 00:31:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:56,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:56,559 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:31:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:31:56,561 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:31:56,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1679950554, now seen corresponding path program 134 times [2022-03-18 00:31:56,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:56,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625104898] [2022-03-18 00:31:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:56,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:58,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:58,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:58,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625104898] [2022-03-18 00:31:58,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625104898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:58,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746246804] [2022-03-18 00:31:58,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:31:58,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:58,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:58,128 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) [2022-03-18 00:31:58,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-18 00:31:58,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:31:58,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:58,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-18 00:31:58,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:58,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:00,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746246804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:00,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:00,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 104 [2022-03-18 00:32:00,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:00,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1290955105] [2022-03-18 00:32:00,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1290955105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:00,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:00,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-18 00:32:00,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223997575] [2022-03-18 00:32:00,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:00,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-18 00:32:00,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:00,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-18 00:32:00,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:32:00,248 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 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) [2022-03-18 00:32:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:02,296 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2022-03-18 00:32:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-18 00:32:02,296 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 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 [2022-03-18 00:32:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:02,297 INFO L225 Difference]: With dead ends: 156 [2022-03-18 00:32:02,297 INFO L226 Difference]: Without dead ends: 151 [2022-03-18 00:32:02,298 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12363, Invalid=17393, Unknown=0, NotChecked=0, Total=29756 [2022-03-18 00:32:02,299 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 146 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:02,299 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 38 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:32:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-18 00:32:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-03-18 00:32:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 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) [2022-03-18 00:32:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 169 transitions. [2022-03-18 00:32:02,309 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 169 transitions. Word has length 147 [2022-03-18 00:32:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:02,309 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 169 transitions. [2022-03-18 00:32:02,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 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) [2022-03-18 00:32:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 169 transitions. [2022-03-18 00:32:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 00:32:02,310 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:02,310 INFO L500 BasicCegarLoop]: trace histogram [69, 50, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:02,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:02,532 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 [2022-03-18 00:32:02,532 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:02,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1544893185, now seen corresponding path program 135 times [2022-03-18 00:32:02,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:02,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [682656192] [2022-03-18 00:32:02,750 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:32:02,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1619355917, now seen corresponding path program 1 times [2022-03-18 00:32:02,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:02,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535278509] [2022-03-18 00:32:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:02,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:02,752 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:32:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:02,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:32:02,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1544893185, now seen corresponding path program 136 times [2022-03-18 00:32:02,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:02,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284188171] [2022-03-18 00:32:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:02,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:04,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:04,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:04,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284188171] [2022-03-18 00:32:04,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284188171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:04,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493030929] [2022-03-18 00:32:04,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:04,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:04,340 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) [2022-03-18 00:32:04,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-18 00:32:04,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:04,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 00:32:04,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:04,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:06,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493030929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:06,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:06,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 104 [2022-03-18 00:32:06,404 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:06,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [682656192] [2022-03-18 00:32:06,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [682656192] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:06,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:06,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-18 00:32:06,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561772693] [2022-03-18 00:32:06,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:06,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-18 00:32:06,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:06,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-18 00:32:06,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:32:06,406 INFO L87 Difference]: Start difference. First operand 150 states and 169 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 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) [2022-03-18 00:32:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:08,502 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2022-03-18 00:32:08,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 00:32:08,502 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 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 [2022-03-18 00:32:08,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:08,503 INFO L225 Difference]: With dead ends: 158 [2022-03-18 00:32:08,503 INFO L226 Difference]: Without dead ends: 153 [2022-03-18 00:32:08,505 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12466, Invalid=17636, Unknown=0, NotChecked=0, Total=30102 [2022-03-18 00:32:08,505 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:08,505 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 18 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:32:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-18 00:32:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-03-18 00:32:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.1428571428571428) internal successors, (168), 147 states have internal predecessors, (168), 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) [2022-03-18 00:32:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 172 transitions. [2022-03-18 00:32:08,515 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 172 transitions. Word has length 149 [2022-03-18 00:32:08,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:08,515 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 172 transitions. [2022-03-18 00:32:08,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 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) [2022-03-18 00:32:08,515 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 172 transitions. [2022-03-18 00:32:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-18 00:32:08,516 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:08,516 INFO L500 BasicCegarLoop]: trace histogram [70, 50, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:08,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:08,735 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 [2022-03-18 00:32:08,735 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash -346661348, now seen corresponding path program 137 times [2022-03-18 00:32:08,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:08,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1532290417] [2022-03-18 00:32:08,951 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:32:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1678461261, now seen corresponding path program 1 times [2022-03-18 00:32:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:08,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883498327] [2022-03-18 00:32:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:08,953 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:32:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:08,955 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:32:08,955 INFO L85 PathProgramCache]: Analyzing trace with hash -346661348, now seen corresponding path program 138 times [2022-03-18 00:32:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:08,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17191449] [2022-03-18 00:32:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:08,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:10,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:10,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17191449] [2022-03-18 00:32:10,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17191449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:10,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109032868] [2022-03-18 00:32:10,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:10,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:10,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:10,653 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) [2022-03-18 00:32:10,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-18 00:32:10,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2022-03-18 00:32:10,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 00:32:10,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2485 proven. 1225 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-03-18 00:32:11,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2485 proven. 1225 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-03-18 00:32:12,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109032868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:12,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:12,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 38, 38] total 103 [2022-03-18 00:32:12,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:12,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1532290417] [2022-03-18 00:32:12,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1532290417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:12,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:12,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-18 00:32:12,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121517307] [2022-03-18 00:32:12,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:12,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-18 00:32:12,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-18 00:32:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:32:12,711 INFO L87 Difference]: Start difference. First operand 152 states and 172 transitions. Second operand has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 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) [2022-03-18 00:32:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:14,927 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2022-03-18 00:32:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-18 00:32:14,928 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 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 [2022-03-18 00:32:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:14,929 INFO L225 Difference]: With dead ends: 160 [2022-03-18 00:32:14,929 INFO L226 Difference]: Without dead ends: 155 [2022-03-18 00:32:14,930 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2589 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12466, Invalid=17636, Unknown=0, NotChecked=0, Total=30102 [2022-03-18 00:32:14,931 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 150 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:14,931 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 43 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:32:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-18 00:32:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-03-18 00:32:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.1476510067114094) internal successors, (171), 149 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) [2022-03-18 00:32:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 175 transitions. [2022-03-18 00:32:14,942 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 175 transitions. Word has length 151 [2022-03-18 00:32:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:14,942 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 175 transitions. [2022-03-18 00:32:14,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 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) [2022-03-18 00:32:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 175 transitions. [2022-03-18 00:32:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-18 00:32:14,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:14,943 INFO L500 BasicCegarLoop]: trace histogram [71, 50, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:14,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-18 00:32:15,159 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 [2022-03-18 00:32:15,159 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1359401353, now seen corresponding path program 139 times [2022-03-18 00:32:15,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:15,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569848070] [2022-03-18 00:32:15,354 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:32:15,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1737566605, now seen corresponding path program 1 times [2022-03-18 00:32:15,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:15,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685065300] [2022-03-18 00:32:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:15,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:15,356 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:32:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:15,357 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:32:15,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1359401353, now seen corresponding path program 140 times [2022-03-18 00:32:15,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:15,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89353782] [2022-03-18 00:32:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:15,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:17,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:17,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:17,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89353782] [2022-03-18 00:32:17,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89353782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:17,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344346195] [2022-03-18 00:32:17,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:17,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:17,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:17,016 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) [2022-03-18 00:32:17,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-18 00:32:17,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:17,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 00:32:17,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:17,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:19,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344346195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:19,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:19,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 104 [2022-03-18 00:32:19,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:19,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569848070] [2022-03-18 00:32:19,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569848070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:19,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:19,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-18 00:32:19,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672067745] [2022-03-18 00:32:19,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:19,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-18 00:32:19,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-18 00:32:19,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:32:19,111 INFO L87 Difference]: Start difference. First operand 154 states and 175 transitions. Second operand has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 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) [2022-03-18 00:32:21,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:21,408 INFO L93 Difference]: Finished difference Result 162 states and 185 transitions. [2022-03-18 00:32:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 00:32:21,412 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 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 [2022-03-18 00:32:21,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:21,413 INFO L225 Difference]: With dead ends: 162 [2022-03-18 00:32:21,413 INFO L226 Difference]: Without dead ends: 157 [2022-03-18 00:32:21,415 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2923 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12672, Invalid=18128, Unknown=0, NotChecked=0, Total=30800 [2022-03-18 00:32:21,415 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:21,415 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 48 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:32:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-18 00:32:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-03-18 00:32:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.1523178807947019) internal successors, (174), 151 states have internal predecessors, (174), 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) [2022-03-18 00:32:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 178 transitions. [2022-03-18 00:32:21,426 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 178 transitions. Word has length 153 [2022-03-18 00:32:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:21,426 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 178 transitions. [2022-03-18 00:32:21,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 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) [2022-03-18 00:32:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 178 transitions. [2022-03-18 00:32:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-18 00:32:21,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:21,427 INFO L500 BasicCegarLoop]: trace histogram [72, 50, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:21,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:21,647 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 [2022-03-18 00:32:21,647 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:21,648 INFO L85 PathProgramCache]: Analyzing trace with hash 355030034, now seen corresponding path program 141 times [2022-03-18 00:32:21,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:21,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1951069912] [2022-03-18 00:32:21,874 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:32:21,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1796671949, now seen corresponding path program 1 times [2022-03-18 00:32:21,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:21,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649010345] [2022-03-18 00:32:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:21,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:21,877 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:32:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:21,878 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:32:21,879 INFO L85 PathProgramCache]: Analyzing trace with hash 355030034, now seen corresponding path program 142 times [2022-03-18 00:32:21,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:21,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933127470] [2022-03-18 00:32:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:21,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:23,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:23,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:23,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933127470] [2022-03-18 00:32:23,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933127470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:23,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039140831] [2022-03-18 00:32:23,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:23,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:23,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:23,617 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) [2022-03-18 00:32:23,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-18 00:32:23,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:23,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-18 00:32:23,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:23,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:25,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039140831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:25,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:25,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 104 [2022-03-18 00:32:25,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:25,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1951069912] [2022-03-18 00:32:25,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1951069912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:25,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:25,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-18 00:32:25,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619878445] [2022-03-18 00:32:25,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:25,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-18 00:32:25,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-18 00:32:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:32:25,600 INFO L87 Difference]: Start difference. First operand 156 states and 178 transitions. Second operand has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 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) [2022-03-18 00:32:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:27,865 INFO L93 Difference]: Finished difference Result 164 states and 188 transitions. [2022-03-18 00:32:27,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-18 00:32:27,865 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 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 [2022-03-18 00:32:27,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:27,866 INFO L225 Difference]: With dead ends: 164 [2022-03-18 00:32:27,866 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 00:32:27,867 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2996 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12775, Invalid=18377, Unknown=0, NotChecked=0, Total=31152 [2022-03-18 00:32:27,867 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:27,867 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 38 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:32:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 00:32:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-03-18 00:32:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.1568627450980393) internal successors, (177), 153 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) [2022-03-18 00:32:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2022-03-18 00:32:27,878 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 155 [2022-03-18 00:32:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:27,878 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2022-03-18 00:32:27,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 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) [2022-03-18 00:32:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2022-03-18 00:32:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-18 00:32:27,879 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:27,879 INFO L500 BasicCegarLoop]: trace histogram [73, 50, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:27,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-18 00:32:28,094 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 [2022-03-18 00:32:28,094 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1343848723, now seen corresponding path program 143 times [2022-03-18 00:32:28,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:28,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [535706184] [2022-03-18 00:32:28,290 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:32:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1855777293, now seen corresponding path program 1 times [2022-03-18 00:32:28,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:28,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345092107] [2022-03-18 00:32:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:28,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:28,293 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:32:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:28,294 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:32:28,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1343848723, now seen corresponding path program 144 times [2022-03-18 00:32:28,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:28,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15311821] [2022-03-18 00:32:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:28,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:30,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:30,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:30,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15311821] [2022-03-18 00:32:30,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15311821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:30,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217491621] [2022-03-18 00:32:30,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:30,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:30,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:30,053 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) [2022-03-18 00:32:30,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-18 00:32:30,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2022-03-18 00:32:30,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 00:32:30,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2701 proven. 1296 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-03-18 00:32:31,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2701 proven. 1296 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-03-18 00:32:31,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217491621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:31,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:31,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 39, 39] total 103 [2022-03-18 00:32:31,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:31,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [535706184] [2022-03-18 00:32:31,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [535706184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:31,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:31,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-18 00:32:31,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256226365] [2022-03-18 00:32:31,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:31,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-18 00:32:31,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:31,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-18 00:32:31,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:32:31,996 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 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) [2022-03-18 00:32:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:34,360 INFO L93 Difference]: Finished difference Result 166 states and 191 transitions. [2022-03-18 00:32:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-18 00:32:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 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 [2022-03-18 00:32:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:34,361 INFO L225 Difference]: With dead ends: 166 [2022-03-18 00:32:34,361 INFO L226 Difference]: Without dead ends: 161 [2022-03-18 00:32:34,363 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2810 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12775, Invalid=18377, Unknown=0, NotChecked=0, Total=31152 [2022-03-18 00:32:34,363 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 156 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:34,363 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 48 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:32:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-18 00:32:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-03-18 00:32:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.1612903225806452) internal successors, (180), 155 states have internal predecessors, (180), 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) [2022-03-18 00:32:34,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 184 transitions. [2022-03-18 00:32:34,375 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 184 transitions. Word has length 157 [2022-03-18 00:32:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:34,375 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 184 transitions. [2022-03-18 00:32:34,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 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) [2022-03-18 00:32:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 184 transitions. [2022-03-18 00:32:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-18 00:32:34,376 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:34,376 INFO L500 BasicCegarLoop]: trace histogram [74, 50, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:34,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-18 00:32:34,587 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 [2022-03-18 00:32:34,587 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1878761720, now seen corresponding path program 145 times [2022-03-18 00:32:34,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:34,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [755070431] [2022-03-18 00:32:34,749 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:32:34,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1914882637, now seen corresponding path program 1 times [2022-03-18 00:32:34,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:34,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685680811] [2022-03-18 00:32:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:34,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:34,752 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:32:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:34,753 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:32:34,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1878761720, now seen corresponding path program 146 times [2022-03-18 00:32:34,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:34,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297770141] [2022-03-18 00:32:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:34,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:36,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:36,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297770141] [2022-03-18 00:32:36,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297770141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:36,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549350075] [2022-03-18 00:32:36,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:36,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:36,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:36,562 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) [2022-03-18 00:32:36,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-18 00:32:36,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:36,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:36,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-18 00:32:36,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:36,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:38,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549350075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:38,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:38,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 104 [2022-03-18 00:32:38,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:38,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [755070431] [2022-03-18 00:32:38,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [755070431] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:38,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:38,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-18 00:32:38,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260917698] [2022-03-18 00:32:38,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:38,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-18 00:32:38,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:38,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-18 00:32:38,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:32:38,448 INFO L87 Difference]: Start difference. First operand 160 states and 184 transitions. Second operand has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 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) [2022-03-18 00:32:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:40,929 INFO L93 Difference]: Finished difference Result 168 states and 194 transitions. [2022-03-18 00:32:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-18 00:32:40,930 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 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 [2022-03-18 00:32:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:40,931 INFO L225 Difference]: With dead ends: 168 [2022-03-18 00:32:40,931 INFO L226 Difference]: Without dead ends: 163 [2022-03-18 00:32:40,932 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12981, Invalid=18881, Unknown=0, NotChecked=0, Total=31862 [2022-03-18 00:32:40,933 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 158 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:40,933 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 53 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:32:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-18 00:32:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-03-18 00:32:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 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) [2022-03-18 00:32:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 187 transitions. [2022-03-18 00:32:40,945 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 187 transitions. Word has length 159 [2022-03-18 00:32:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:40,945 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 187 transitions. [2022-03-18 00:32:40,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 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) [2022-03-18 00:32:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 187 transitions. [2022-03-18 00:32:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-18 00:32:40,946 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:40,946 INFO L500 BasicCegarLoop]: trace histogram [75, 50, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:40,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:41,169 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 [2022-03-18 00:32:41,169 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:41,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:41,170 INFO L85 PathProgramCache]: Analyzing trace with hash -534076317, now seen corresponding path program 147 times [2022-03-18 00:32:41,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:41,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [365843545] [2022-03-18 00:32:41,400 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:32:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1973987981, now seen corresponding path program 1 times [2022-03-18 00:32:41,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:41,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894411696] [2022-03-18 00:32:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:41,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:41,402 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:32:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:41,404 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:32:41,404 INFO L85 PathProgramCache]: Analyzing trace with hash -534076317, now seen corresponding path program 148 times [2022-03-18 00:32:41,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:41,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433289118] [2022-03-18 00:32:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:41,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:43,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:43,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:43,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433289118] [2022-03-18 00:32:43,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433289118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:43,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220711051] [2022-03-18 00:32:43,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:43,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:43,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:43,299 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) [2022-03-18 00:32:43,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-18 00:32:43,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:43,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:43,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 00:32:43,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:43,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:45,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220711051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:45,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:45,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 104 [2022-03-18 00:32:45,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:45,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [365843545] [2022-03-18 00:32:45,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [365843545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:45,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:45,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-18 00:32:45,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6647160] [2022-03-18 00:32:45,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:45,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-18 00:32:45,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:45,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-18 00:32:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:32:45,165 INFO L87 Difference]: Start difference. First operand 162 states and 187 transitions. Second operand has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 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) [2022-03-18 00:32:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:47,684 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2022-03-18 00:32:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-18 00:32:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 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 [2022-03-18 00:32:47,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:47,685 INFO L225 Difference]: With dead ends: 170 [2022-03-18 00:32:47,685 INFO L226 Difference]: Without dead ends: 165 [2022-03-18 00:32:47,686 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13084, Invalid=19136, Unknown=0, NotChecked=0, Total=32220 [2022-03-18 00:32:47,686 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 160 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:47,686 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 43 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:32:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-18 00:32:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-03-18 00:32:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.169811320754717) internal successors, (186), 159 states have internal predecessors, (186), 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) [2022-03-18 00:32:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2022-03-18 00:32:47,695 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 161 [2022-03-18 00:32:47,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:47,695 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2022-03-18 00:32:47,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 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) [2022-03-18 00:32:47,695 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2022-03-18 00:32:47,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-18 00:32:47,696 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:47,696 INFO L500 BasicCegarLoop]: trace histogram [76, 50, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:47,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-18 00:32:47,900 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 [2022-03-18 00:32:47,900 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:47,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:47,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1076560130, now seen corresponding path program 149 times [2022-03-18 00:32:47,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:47,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [294437053] [2022-03-18 00:32:48,135 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:32:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2033093325, now seen corresponding path program 1 times [2022-03-18 00:32:48,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:48,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428037503] [2022-03-18 00:32:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:48,138 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:32:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:48,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:32:48,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1076560130, now seen corresponding path program 150 times [2022-03-18 00:32:48,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:48,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080646050] [2022-03-18 00:32:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:48,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:50,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:50,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:50,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080646050] [2022-03-18 00:32:50,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080646050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:50,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832190258] [2022-03-18 00:32:50,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:50,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:50,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:50,062 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) [2022-03-18 00:32:50,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-18 00:32:50,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2022-03-18 00:32:50,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:50,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 00:32:50,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2926 proven. 1444 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-03-18 00:32:50,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2926 proven. 1444 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-03-18 00:32:51,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832190258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:51,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:51,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 41, 41] total 103 [2022-03-18 00:32:51,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:51,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [294437053] [2022-03-18 00:32:51,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [294437053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:51,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:51,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-18 00:32:51,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063979154] [2022-03-18 00:32:51,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:51,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 00:32:51,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 00:32:51,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:32:51,867 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 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) [2022-03-18 00:32:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:54,471 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2022-03-18 00:32:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-18 00:32:54,471 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 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 [2022-03-18 00:32:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:54,472 INFO L225 Difference]: With dead ends: 172 [2022-03-18 00:32:54,472 INFO L226 Difference]: Without dead ends: 167 [2022-03-18 00:32:54,473 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 303 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3039 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13084, Invalid=19136, Unknown=0, NotChecked=0, Total=32220 [2022-03-18 00:32:54,474 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 162 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:54,474 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 33 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:32:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-18 00:32:54,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-03-18 00:32:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.173913043478261) internal successors, (189), 161 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) [2022-03-18 00:32:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 193 transitions. [2022-03-18 00:32:54,482 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 193 transitions. Word has length 163 [2022-03-18 00:32:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:54,483 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 193 transitions. [2022-03-18 00:32:54,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 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) [2022-03-18 00:32:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 193 transitions. [2022-03-18 00:32:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-18 00:32:54,483 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:54,483 INFO L500 BasicCegarLoop]: trace histogram [77, 50, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:54,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-18 00:32:54,684 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 [2022-03-18 00:32:54,684 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:54,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1582505689, now seen corresponding path program 151 times [2022-03-18 00:32:54,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:54,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1075559803] [2022-03-18 00:32:54,923 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:32:54,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2092198669, now seen corresponding path program 1 times [2022-03-18 00:32:54,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:54,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250212054] [2022-03-18 00:32:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:54,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:54,929 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:32:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:32:54,932 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:32:54,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1582505689, now seen corresponding path program 152 times [2022-03-18 00:32:54,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:54,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917888620] [2022-03-18 00:32:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:54,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:56,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:56,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917888620] [2022-03-18 00:32:56,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917888620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082328090] [2022-03-18 00:32:56,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:56,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:56,916 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) [2022-03-18 00:32:56,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-18 00:32:56,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:56,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:56,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 00:32:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:57,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:58,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082328090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:58,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:58,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 104 [2022-03-18 00:32:58,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:58,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1075559803] [2022-03-18 00:32:58,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1075559803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:58,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:58,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-18 00:32:58,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061153769] [2022-03-18 00:32:58,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:58,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-18 00:32:58,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:58,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-18 00:32:58,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:32:58,742 INFO L87 Difference]: Start difference. First operand 166 states and 193 transitions. Second operand has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 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) [2022-03-18 00:33:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:01,527 INFO L93 Difference]: Finished difference Result 174 states and 203 transitions. [2022-03-18 00:33:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-18 00:33:01,527 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 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 [2022-03-18 00:33:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:01,528 INFO L225 Difference]: With dead ends: 174 [2022-03-18 00:33:01,528 INFO L226 Difference]: Without dead ends: 169 [2022-03-18 00:33:01,529 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3376 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13290, Invalid=19652, Unknown=0, NotChecked=0, Total=32942 [2022-03-18 00:33:01,529 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 164 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:01,529 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 53 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:33:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-18 00:33:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-03-18 00:33:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.177914110429448) internal successors, (192), 163 states have internal predecessors, (192), 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) [2022-03-18 00:33:01,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2022-03-18 00:33:01,538 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 165 [2022-03-18 00:33:01,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:01,538 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2022-03-18 00:33:01,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 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) [2022-03-18 00:33:01,539 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2022-03-18 00:33:01,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-18 00:33:01,539 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:01,539 INFO L500 BasicCegarLoop]: trace histogram [78, 50, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:01,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-18 00:33:01,739 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 [2022-03-18 00:33:01,740 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1439216628, now seen corresponding path program 153 times [2022-03-18 00:33:01,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:01,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [842397432] [2022-03-18 00:33:01,905 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:33:01,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2143663283, now seen corresponding path program 1 times [2022-03-18 00:33:01,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:01,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270979233] [2022-03-18 00:33:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:01,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:01,911 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:33:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:01,914 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:33:01,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1439216628, now seen corresponding path program 154 times [2022-03-18 00:33:01,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:01,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413964164] [2022-03-18 00:33:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:01,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:03,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:03,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:03,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413964164] [2022-03-18 00:33:03,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413964164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:03,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140923571] [2022-03-18 00:33:03,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:33:03,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:03,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:03,991 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) [2022-03-18 00:33:03,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-18 00:33:04,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:33:04,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:04,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-18 00:33:04,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:04,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:05,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140923571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:05,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:05,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 104 [2022-03-18 00:33:05,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:05,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [842397432] [2022-03-18 00:33:05,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [842397432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:05,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:05,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-18 00:33:05,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671009056] [2022-03-18 00:33:05,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:05,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-18 00:33:05,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-18 00:33:05,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:33:05,744 INFO L87 Difference]: Start difference. First operand 168 states and 196 transitions. Second operand has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 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) [2022-03-18 00:33:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:08,568 INFO L93 Difference]: Finished difference Result 176 states and 206 transitions. [2022-03-18 00:33:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 00:33:08,569 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 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 [2022-03-18 00:33:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:08,569 INFO L225 Difference]: With dead ends: 176 [2022-03-18 00:33:08,569 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 00:33:08,571 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3455 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13393, Invalid=19913, Unknown=0, NotChecked=0, Total=33306 [2022-03-18 00:33:08,572 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 166 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:08,572 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 38 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:33:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 00:33:08,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-03-18 00:33:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 165 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) [2022-03-18 00:33:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 199 transitions. [2022-03-18 00:33:08,586 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 199 transitions. Word has length 167 [2022-03-18 00:33:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:08,587 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 199 transitions. [2022-03-18 00:33:08,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 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) [2022-03-18 00:33:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 199 transitions. [2022-03-18 00:33:08,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-18 00:33:08,588 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:08,588 INFO L500 BasicCegarLoop]: trace histogram [79, 50, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:08,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:08,803 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 [2022-03-18 00:33:08,803 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1177382479, now seen corresponding path program 155 times [2022-03-18 00:33:08,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:08,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [939775173] [2022-03-18 00:33:09,090 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:33:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2084557939, now seen corresponding path program 1 times [2022-03-18 00:33:09,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:09,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018937909] [2022-03-18 00:33:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:09,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:09,093 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:33:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:09,095 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:33:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1177382479, now seen corresponding path program 156 times [2022-03-18 00:33:09,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:09,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317694517] [2022-03-18 00:33:09,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:09,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:11,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:11,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:11,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317694517] [2022-03-18 00:33:11,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317694517] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:11,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903295542] [2022-03-18 00:33:11,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:33:11,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:11,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:11,290 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) [2022-03-18 00:33:11,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-18 00:33:11,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2022-03-18 00:33:11,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 00:33:11,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2022-03-18 00:33:12,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2022-03-18 00:33:12,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903295542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:12,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:12,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 42, 42] total 103 [2022-03-18 00:33:12,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:12,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [939775173] [2022-03-18 00:33:12,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [939775173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:12,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:12,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-18 00:33:12,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517195990] [2022-03-18 00:33:12,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:12,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-18 00:33:12,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-18 00:33:12,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:33:12,995 INFO L87 Difference]: Start difference. First operand 170 states and 199 transitions. Second operand has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 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) [2022-03-18 00:33:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:15,884 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2022-03-18 00:33:15,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-18 00:33:15,884 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 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 [2022-03-18 00:33:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:15,885 INFO L225 Difference]: With dead ends: 178 [2022-03-18 00:33:15,885 INFO L226 Difference]: Without dead ends: 173 [2022-03-18 00:33:15,886 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13393, Invalid=19913, Unknown=0, NotChecked=0, Total=33306 [2022-03-18 00:33:15,886 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 168 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:15,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 48 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:33:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-18 00:33:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-03-18 00:33:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.18562874251497) internal successors, (198), 167 states have internal predecessors, (198), 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) [2022-03-18 00:33:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2022-03-18 00:33:15,896 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 169 [2022-03-18 00:33:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:15,896 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2022-03-18 00:33:15,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 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) [2022-03-18 00:33:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2022-03-18 00:33:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-18 00:33:15,897 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:15,897 INFO L500 BasicCegarLoop]: trace histogram [80, 50, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:15,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:16,098 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 [2022-03-18 00:33:16,098 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:16,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1337131542, now seen corresponding path program 157 times [2022-03-18 00:33:16,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:16,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005617878] [2022-03-18 00:33:16,281 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:33:16,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2025452595, now seen corresponding path program 1 times [2022-03-18 00:33:16,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:16,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074833515] [2022-03-18 00:33:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:16,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:16,283 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:33:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:16,284 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:33:16,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1337131542, now seen corresponding path program 158 times [2022-03-18 00:33:16,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:16,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906094606] [2022-03-18 00:33:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:16,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:18,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:18,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:18,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906094606] [2022-03-18 00:33:18,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906094606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:18,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380105815] [2022-03-18 00:33:18,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:33:18,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:18,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:18,419 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) [2022-03-18 00:33:18,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-18 00:33:18,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:33:18,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-18 00:33:18,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:18,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:20,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380105815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:20,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:20,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 104 [2022-03-18 00:33:20,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:20,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005617878] [2022-03-18 00:33:20,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005617878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:20,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:20,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-18 00:33:20,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117364608] [2022-03-18 00:33:20,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:20,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-18 00:33:20,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:20,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-18 00:33:20,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:33:20,138 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 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) [2022-03-18 00:33:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:23,163 INFO L93 Difference]: Finished difference Result 180 states and 212 transitions. [2022-03-18 00:33:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 00:33:23,163 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 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 [2022-03-18 00:33:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:23,164 INFO L225 Difference]: With dead ends: 180 [2022-03-18 00:33:23,164 INFO L226 Difference]: Without dead ends: 175 [2022-03-18 00:33:23,165 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 323 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13599, Invalid=20441, Unknown=0, NotChecked=0, Total=34040 [2022-03-18 00:33:23,165 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 170 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:23,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 33 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:33:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-18 00:33:23,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-03-18 00:33:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.1893491124260356) internal successors, (201), 169 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) [2022-03-18 00:33:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 205 transitions. [2022-03-18 00:33:23,181 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 205 transitions. Word has length 171 [2022-03-18 00:33:23,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:23,181 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 205 transitions. [2022-03-18 00:33:23,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 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) [2022-03-18 00:33:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 205 transitions. [2022-03-18 00:33:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-18 00:33:23,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:23,182 INFO L500 BasicCegarLoop]: trace histogram [81, 50, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:23,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:23,395 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 [2022-03-18 00:33:23,395 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash 281481925, now seen corresponding path program 159 times [2022-03-18 00:33:23,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:23,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1756184205] [2022-03-18 00:33:23,627 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:33:23,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1966347251, now seen corresponding path program 1 times [2022-03-18 00:33:23,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:23,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562276280] [2022-03-18 00:33:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:23,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:23,629 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:33:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:23,631 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:33:23,631 INFO L85 PathProgramCache]: Analyzing trace with hash 281481925, now seen corresponding path program 160 times [2022-03-18 00:33:23,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:23,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277314271] [2022-03-18 00:33:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:23,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:25,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:25,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:25,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277314271] [2022-03-18 00:33:25,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277314271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:25,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333456966] [2022-03-18 00:33:25,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:33:25,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:25,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:25,812 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) [2022-03-18 00:33:25,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-18 00:33:25,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:33:25,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:25,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 00:33:25,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:26,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:27,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333456966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:27,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:27,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 104 [2022-03-18 00:33:27,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:27,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1756184205] [2022-03-18 00:33:27,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1756184205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:27,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:27,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-18 00:33:27,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921670901] [2022-03-18 00:33:27,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:27,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-18 00:33:27,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:27,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-18 00:33:27,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:33:27,477 INFO L87 Difference]: Start difference. First operand 174 states and 205 transitions. Second operand has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 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) [2022-03-18 00:33:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:30,393 INFO L93 Difference]: Finished difference Result 182 states and 215 transitions. [2022-03-18 00:33:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-18 00:33:30,394 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 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 [2022-03-18 00:33:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:30,394 INFO L225 Difference]: With dead ends: 182 [2022-03-18 00:33:30,394 INFO L226 Difference]: Without dead ends: 177 [2022-03-18 00:33:30,396 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13702, Invalid=20708, Unknown=0, NotChecked=0, Total=34410 [2022-03-18 00:33:30,396 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 172 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:30,396 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 58 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:33:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-18 00:33:30,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-03-18 00:33:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.1929824561403508) internal successors, (204), 171 states have internal predecessors, (204), 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) [2022-03-18 00:33:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2022-03-18 00:33:30,418 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 173 [2022-03-18 00:33:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:30,418 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2022-03-18 00:33:30,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 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) [2022-03-18 00:33:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2022-03-18 00:33:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-18 00:33:30,419 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:30,419 INFO L500 BasicCegarLoop]: trace histogram [82, 50, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:30,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:30,635 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 [2022-03-18 00:33:30,635 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:30,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:30,636 INFO L85 PathProgramCache]: Analyzing trace with hash 990862560, now seen corresponding path program 161 times [2022-03-18 00:33:30,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:30,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1625115494] [2022-03-18 00:33:30,887 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:33:30,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1907241907, now seen corresponding path program 1 times [2022-03-18 00:33:30,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:30,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558858718] [2022-03-18 00:33:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:30,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:30,890 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:33:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:30,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:33:30,892 INFO L85 PathProgramCache]: Analyzing trace with hash 990862560, now seen corresponding path program 162 times [2022-03-18 00:33:30,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:30,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572549176] [2022-03-18 00:33:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:30,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:33,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:33,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:33,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572549176] [2022-03-18 00:33:33,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572549176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:33,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968508790] [2022-03-18 00:33:33,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:33:33,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:33,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:33,164 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) [2022-03-18 00:33:33,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-18 00:33:33,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2022-03-18 00:33:33,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:33,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 00:33:33,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3403 proven. 1681 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-18 00:33:33,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3403 proven. 1681 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-03-18 00:33:34,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968508790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:34,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:34,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 44, 44] total 103 [2022-03-18 00:33:34,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:34,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1625115494] [2022-03-18 00:33:34,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1625115494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:34,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:34,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-18 00:33:34,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553042588] [2022-03-18 00:33:34,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:34,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-18 00:33:34,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:34,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-18 00:33:34,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:33:34,756 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 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) [2022-03-18 00:33:37,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:37,910 INFO L93 Difference]: Finished difference Result 184 states and 218 transitions. [2022-03-18 00:33:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-18 00:33:37,911 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 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 [2022-03-18 00:33:37,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:37,911 INFO L225 Difference]: With dead ends: 184 [2022-03-18 00:33:37,911 INFO L226 Difference]: Without dead ends: 179 [2022-03-18 00:33:37,913 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3525 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13702, Invalid=20708, Unknown=0, NotChecked=0, Total=34410 [2022-03-18 00:33:37,913 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:37,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 18 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:33:37,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-18 00:33:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-03-18 00:33:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.1965317919075145) internal successors, (207), 173 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) [2022-03-18 00:33:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 211 transitions. [2022-03-18 00:33:37,924 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 211 transitions. Word has length 175 [2022-03-18 00:33:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:37,924 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 211 transitions. [2022-03-18 00:33:37,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 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) [2022-03-18 00:33:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 211 transitions. [2022-03-18 00:33:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-18 00:33:37,925 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:37,925 INFO L500 BasicCegarLoop]: trace histogram [83, 50, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:37,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:38,125 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 [2022-03-18 00:33:38,125 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:38,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:38,126 INFO L85 PathProgramCache]: Analyzing trace with hash -194147269, now seen corresponding path program 163 times [2022-03-18 00:33:38,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:38,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [513502442] [2022-03-18 00:33:38,321 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:33:38,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1848136563, now seen corresponding path program 1 times [2022-03-18 00:33:38,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:38,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735375070] [2022-03-18 00:33:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:38,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:38,323 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:33:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:38,325 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:33:38,325 INFO L85 PathProgramCache]: Analyzing trace with hash -194147269, now seen corresponding path program 164 times [2022-03-18 00:33:38,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:38,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958550672] [2022-03-18 00:33:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:38,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:40,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:40,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:40,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958550672] [2022-03-18 00:33:40,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958550672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:40,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474165208] [2022-03-18 00:33:40,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:33:40,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:40,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:40,612 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) [2022-03-18 00:33:40,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-18 00:33:40,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:33:40,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:40,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-18 00:33:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:40,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:42,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474165208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:42,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:42,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 104 [2022-03-18 00:33:42,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:42,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [513502442] [2022-03-18 00:33:42,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [513502442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:42,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:42,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-18 00:33:42,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477535672] [2022-03-18 00:33:42,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:42,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-18 00:33:42,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-18 00:33:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:33:42,160 INFO L87 Difference]: Start difference. First operand 178 states and 211 transitions. Second operand has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 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) [2022-03-18 00:33:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:45,343 INFO L93 Difference]: Finished difference Result 186 states and 221 transitions. [2022-03-18 00:33:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-18 00:33:45,343 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 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 [2022-03-18 00:33:45,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:45,344 INFO L225 Difference]: With dead ends: 186 [2022-03-18 00:33:45,344 INFO L226 Difference]: Without dead ends: 181 [2022-03-18 00:33:45,345 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3865 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13908, Invalid=21248, Unknown=0, NotChecked=0, Total=35156 [2022-03-18 00:33:45,345 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 176 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:45,345 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 63 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:33:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-18 00:33:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-03-18 00:33:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.2) internal successors, (210), 175 states have internal predecessors, (210), 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) [2022-03-18 00:33:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2022-03-18 00:33:45,357 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 177 [2022-03-18 00:33:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:45,357 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2022-03-18 00:33:45,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 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) [2022-03-18 00:33:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2022-03-18 00:33:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-18 00:33:45,358 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:45,358 INFO L500 BasicCegarLoop]: trace histogram [84, 50, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:45,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-18 00:33:45,558 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 [2022-03-18 00:33:45,559 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:45,559 INFO L85 PathProgramCache]: Analyzing trace with hash -822259498, now seen corresponding path program 165 times [2022-03-18 00:33:45,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:45,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1424910176] [2022-03-18 00:33:45,760 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:33:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1789031219, now seen corresponding path program 1 times [2022-03-18 00:33:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:45,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208765990] [2022-03-18 00:33:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:45,762 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:33:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:45,764 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:33:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash -822259498, now seen corresponding path program 166 times [2022-03-18 00:33:45,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:45,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395868192] [2022-03-18 00:33:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:45,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:48,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:48,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:48,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395868192] [2022-03-18 00:33:48,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395868192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:48,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852611268] [2022-03-18 00:33:48,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:33:48,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:48,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:48,129 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) [2022-03-18 00:33:48,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-18 00:33:48,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:33:48,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-18 00:33:48,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:48,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:49,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852611268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:49,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:49,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 104 [2022-03-18 00:33:49,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:49,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1424910176] [2022-03-18 00:33:49,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1424910176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:49,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:49,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-18 00:33:49,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183640027] [2022-03-18 00:33:49,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:49,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-18 00:33:49,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-18 00:33:49,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:33:49,655 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 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) [2022-03-18 00:33:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:52,952 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2022-03-18 00:33:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-18 00:33:52,953 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 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 [2022-03-18 00:33:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:52,953 INFO L225 Difference]: With dead ends: 188 [2022-03-18 00:33:52,953 INFO L226 Difference]: Without dead ends: 183 [2022-03-18 00:33:52,955 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14011, Invalid=21521, Unknown=0, NotChecked=0, Total=35532 [2022-03-18 00:33:52,955 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 178 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:52,955 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 43 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:33:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-18 00:33:52,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-03-18 00:33:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2033898305084745) internal successors, (213), 177 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) [2022-03-18 00:33:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 217 transitions. [2022-03-18 00:33:52,974 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 217 transitions. Word has length 179 [2022-03-18 00:33:52,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:52,974 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 217 transitions. [2022-03-18 00:33:52,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 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) [2022-03-18 00:33:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 217 transitions. [2022-03-18 00:33:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-18 00:33:52,975 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:52,975 INFO L500 BasicCegarLoop]: trace histogram [85, 50, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:52,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:53,195 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 [2022-03-18 00:33:53,195 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:53,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1152277169, now seen corresponding path program 167 times [2022-03-18 00:33:53,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:53,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [903956626] [2022-03-18 00:33:53,430 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:33:53,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1729925875, now seen corresponding path program 1 times [2022-03-18 00:33:53,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:53,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434635592] [2022-03-18 00:33:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:53,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:53,433 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:33:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:33:53,435 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:33:53,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1152277169, now seen corresponding path program 168 times [2022-03-18 00:33:53,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:53,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960592400] [2022-03-18 00:33:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:53,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:55,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:55,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:55,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960592400] [2022-03-18 00:33:55,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960592400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:55,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552252092] [2022-03-18 00:33:55,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:33:55,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:55,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:55,810 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) [2022-03-18 00:33:55,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-18 00:33:55,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2022-03-18 00:33:55,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:55,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 00:33:55,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3655 proven. 1764 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-03-18 00:33:56,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3655 proven. 1764 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-03-18 00:33:57,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552252092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:57,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:57,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 45, 45] total 103 [2022-03-18 00:33:57,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [903956626] [2022-03-18 00:33:57,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [903956626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:57,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:57,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-18 00:33:57,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622029479] [2022-03-18 00:33:57,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:57,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-18 00:33:57,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:57,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-18 00:33:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:33:57,244 INFO L87 Difference]: Start difference. First operand 182 states and 217 transitions. Second operand has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 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) [2022-03-18 00:34:00,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:00,588 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2022-03-18 00:34:00,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-18 00:34:00,588 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 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 [2022-03-18 00:34:00,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:00,589 INFO L225 Difference]: With dead ends: 190 [2022-03-18 00:34:00,589 INFO L226 Difference]: Without dead ends: 185 [2022-03-18 00:34:00,590 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 348 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14011, Invalid=21521, Unknown=0, NotChecked=0, Total=35532 [2022-03-18 00:34:00,590 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 180 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:00,590 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 58 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:34:00,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-18 00:34:00,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-03-18 00:34:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.2067039106145252) internal successors, (216), 179 states have internal predecessors, (216), 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) [2022-03-18 00:34:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2022-03-18 00:34:00,603 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 181 [2022-03-18 00:34:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:00,603 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2022-03-18 00:34:00,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 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) [2022-03-18 00:34:00,603 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2022-03-18 00:34:00,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-18 00:34:00,604 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:00,604 INFO L500 BasicCegarLoop]: trace histogram [86, 50, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:00,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:00,823 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 [2022-03-18 00:34:00,823 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash 306469324, now seen corresponding path program 169 times [2022-03-18 00:34:00,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:00,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [347508567] [2022-03-18 00:34:01,056 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:34:01,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1670820531, now seen corresponding path program 1 times [2022-03-18 00:34:01,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:01,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991491307] [2022-03-18 00:34:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:01,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:01,060 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:34:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:01,062 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:34:01,062 INFO L85 PathProgramCache]: Analyzing trace with hash 306469324, now seen corresponding path program 170 times [2022-03-18 00:34:01,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:01,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754766822] [2022-03-18 00:34:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:01,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:03,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:03,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754766822] [2022-03-18 00:34:03,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754766822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:03,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734270873] [2022-03-18 00:34:03,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:34:03,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:03,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:03,553 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) [2022-03-18 00:34:03,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-18 00:34:03,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:34:03,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:03,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-18 00:34:03,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:03,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:05,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734270873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:05,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:05,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 104 [2022-03-18 00:34:05,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:05,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [347508567] [2022-03-18 00:34:05,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [347508567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:05,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:05,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-18 00:34:05,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57529702] [2022-03-18 00:34:05,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:05,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-18 00:34:05,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:05,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-18 00:34:05,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:34:05,011 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 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) [2022-03-18 00:34:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:08,375 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2022-03-18 00:34:08,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-18 00:34:08,375 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 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 [2022-03-18 00:34:08,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:08,376 INFO L225 Difference]: With dead ends: 192 [2022-03-18 00:34:08,376 INFO L226 Difference]: Without dead ends: 187 [2022-03-18 00:34:08,377 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4123 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14217, Invalid=22073, Unknown=0, NotChecked=0, Total=36290 [2022-03-18 00:34:08,377 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 182 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:08,378 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 23 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:34:08,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-18 00:34:08,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-03-18 00:34:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.2099447513812154) internal successors, (219), 181 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) [2022-03-18 00:34:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 223 transitions. [2022-03-18 00:34:08,397 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 223 transitions. Word has length 183 [2022-03-18 00:34:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:08,398 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 223 transitions. [2022-03-18 00:34:08,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 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) [2022-03-18 00:34:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 223 transitions. [2022-03-18 00:34:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-18 00:34:08,399 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:08,399 INFO L500 BasicCegarLoop]: trace histogram [87, 50, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:08,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:08,614 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 [2022-03-18 00:34:08,614 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:08,614 INFO L85 PathProgramCache]: Analyzing trace with hash -766050777, now seen corresponding path program 171 times [2022-03-18 00:34:08,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:08,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [327541471] [2022-03-18 00:34:08,842 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:34:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1611715187, now seen corresponding path program 1 times [2022-03-18 00:34:08,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:08,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537976979] [2022-03-18 00:34:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:08,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:08,845 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:34:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:08,847 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:34:08,847 INFO L85 PathProgramCache]: Analyzing trace with hash -766050777, now seen corresponding path program 172 times [2022-03-18 00:34:08,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:08,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731123770] [2022-03-18 00:34:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:08,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:11,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:11,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731123770] [2022-03-18 00:34:11,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731123770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521018161] [2022-03-18 00:34:11,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:34:11,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:11,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:11,332 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) [2022-03-18 00:34:11,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-18 00:34:11,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:34:11,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-18 00:34:11,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:11,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:12,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521018161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:12,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:12,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 104 [2022-03-18 00:34:12,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:12,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [327541471] [2022-03-18 00:34:12,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [327541471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:12,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:12,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-18 00:34:12,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148352195] [2022-03-18 00:34:12,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:12,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-18 00:34:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-18 00:34:12,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:34:12,698 INFO L87 Difference]: Start difference. First operand 186 states and 223 transitions. Second operand has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 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) [2022-03-18 00:34:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:16,142 INFO L93 Difference]: Finished difference Result 194 states and 233 transitions. [2022-03-18 00:34:16,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-18 00:34:16,143 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 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 [2022-03-18 00:34:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:16,143 INFO L225 Difference]: With dead ends: 194 [2022-03-18 00:34:16,143 INFO L226 Difference]: Without dead ends: 189 [2022-03-18 00:34:16,145 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 358 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14320, Invalid=22352, Unknown=0, NotChecked=0, Total=36672 [2022-03-18 00:34:16,145 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 184 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:16,145 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 43 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:34:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-18 00:34:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-03-18 00:34:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.2131147540983607) internal successors, (222), 183 states have internal predecessors, (222), 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) [2022-03-18 00:34:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 226 transitions. [2022-03-18 00:34:16,158 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 226 transitions. Word has length 185 [2022-03-18 00:34:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:16,158 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 226 transitions. [2022-03-18 00:34:16,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 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) [2022-03-18 00:34:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 226 transitions. [2022-03-18 00:34:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-18 00:34:16,159 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:16,159 INFO L500 BasicCegarLoop]: trace histogram [88, 50, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:16,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:16,359 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 [2022-03-18 00:34:16,359 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:16,359 INFO L85 PathProgramCache]: Analyzing trace with hash -665716798, now seen corresponding path program 173 times [2022-03-18 00:34:16,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:16,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [929473711] [2022-03-18 00:34:16,598 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:34:16,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1552609843, now seen corresponding path program 1 times [2022-03-18 00:34:16,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:16,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194192717] [2022-03-18 00:34:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:16,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:16,601 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:34:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:16,603 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:34:16,603 INFO L85 PathProgramCache]: Analyzing trace with hash -665716798, now seen corresponding path program 174 times [2022-03-18 00:34:16,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:16,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629790373] [2022-03-18 00:34:16,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:16,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:19,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:19,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:19,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629790373] [2022-03-18 00:34:19,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629790373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:19,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344956633] [2022-03-18 00:34:19,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:34:19,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:19,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:19,152 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) [2022-03-18 00:34:19,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-18 00:34:19,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2022-03-18 00:34:19,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:19,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 00:34:19,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3916 proven. 1936 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-03-18 00:34:19,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3916 proven. 1936 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-03-18 00:34:20,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344956633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:20,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:20,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 47, 47] total 103 [2022-03-18 00:34:20,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:20,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [929473711] [2022-03-18 00:34:20,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [929473711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:20,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:20,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-18 00:34:20,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736595805] [2022-03-18 00:34:20,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:20,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-18 00:34:20,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:20,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-18 00:34:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:34:20,416 INFO L87 Difference]: Start difference. First operand 188 states and 226 transitions. Second operand has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 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) [2022-03-18 00:34:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:23,832 INFO L93 Difference]: Finished difference Result 196 states and 236 transitions. [2022-03-18 00:34:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-18 00:34:23,833 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 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 [2022-03-18 00:34:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:23,833 INFO L225 Difference]: With dead ends: 196 [2022-03-18 00:34:23,833 INFO L226 Difference]: Without dead ends: 191 [2022-03-18 00:34:23,835 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4047 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14320, Invalid=22352, Unknown=0, NotChecked=0, Total=36672 [2022-03-18 00:34:23,835 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 186 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:23,835 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 33 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:34:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-18 00:34:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-03-18 00:34:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.2162162162162162) internal successors, (225), 185 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) [2022-03-18 00:34:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 229 transitions. [2022-03-18 00:34:23,856 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 229 transitions. Word has length 187 [2022-03-18 00:34:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:23,856 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 229 transitions. [2022-03-18 00:34:23,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 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) [2022-03-18 00:34:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 229 transitions. [2022-03-18 00:34:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-18 00:34:23,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:23,857 INFO L500 BasicCegarLoop]: trace histogram [89, 50, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:23,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-18 00:34:24,057 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 [2022-03-18 00:34:24,058 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1265956509, now seen corresponding path program 175 times [2022-03-18 00:34:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:24,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1970269355] [2022-03-18 00:34:24,244 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:34:24,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1493504499, now seen corresponding path program 1 times [2022-03-18 00:34:24,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:24,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030022135] [2022-03-18 00:34:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:24,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:24,246 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:34:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:24,247 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:34:24,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1265956509, now seen corresponding path program 176 times [2022-03-18 00:34:24,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:24,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32219382] [2022-03-18 00:34:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:24,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:26,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:26,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:26,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32219382] [2022-03-18 00:34:26,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32219382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:26,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632705463] [2022-03-18 00:34:26,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:34:26,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:26,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:26,807 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) [2022-03-18 00:34:26,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-18 00:34:26,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:34:26,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:26,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 00:34:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:27,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:28,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632705463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:28,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:28,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 104 [2022-03-18 00:34:28,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:28,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1970269355] [2022-03-18 00:34:28,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1970269355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:28,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:28,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-18 00:34:28,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624732488] [2022-03-18 00:34:28,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:28,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-18 00:34:28,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:28,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-18 00:34:28,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:34:28,078 INFO L87 Difference]: Start difference. First operand 190 states and 229 transitions. Second operand has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 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) [2022-03-18 00:34:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:31,659 INFO L93 Difference]: Finished difference Result 198 states and 239 transitions. [2022-03-18 00:34:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-18 00:34:31,659 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 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 [2022-03-18 00:34:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:31,660 INFO L225 Difference]: With dead ends: 198 [2022-03-18 00:34:31,660 INFO L226 Difference]: Without dead ends: 193 [2022-03-18 00:34:31,661 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 368 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4390 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=14526, Invalid=22916, Unknown=0, NotChecked=0, Total=37442 [2022-03-18 00:34:31,662 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 188 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:31,662 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 28 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:34:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-18 00:34:31,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-03-18 00:34:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.2192513368983957) internal successors, (228), 187 states have internal predecessors, (228), 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) [2022-03-18 00:34:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 232 transitions. [2022-03-18 00:34:31,676 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 232 transitions. Word has length 189 [2022-03-18 00:34:31,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:31,676 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 232 transitions. [2022-03-18 00:34:31,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 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) [2022-03-18 00:34:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 232 transitions. [2022-03-18 00:34:31,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-18 00:34:31,676 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:31,676 INFO L500 BasicCegarLoop]: trace histogram [90, 50, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:31,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:31,879 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 [2022-03-18 00:34:31,879 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:31,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2116834632, now seen corresponding path program 177 times [2022-03-18 00:34:31,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:31,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [618312804] [2022-03-18 00:34:32,099 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:34:32,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1434399155, now seen corresponding path program 1 times [2022-03-18 00:34:32,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:32,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133484884] [2022-03-18 00:34:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:32,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:32,101 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:34:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:32,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:34:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2116834632, now seen corresponding path program 178 times [2022-03-18 00:34:32,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:32,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88641747] [2022-03-18 00:34:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:34,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:34,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88641747] [2022-03-18 00:34:34,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88641747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138983090] [2022-03-18 00:34:34,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:34:34,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:34,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:34,713 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) [2022-03-18 00:34:34,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-18 00:34:34,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:34:34,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:34,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-18 00:34:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:35,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:35,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138983090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:35,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:35,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 104 [2022-03-18 00:34:35,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:35,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [618312804] [2022-03-18 00:34:35,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [618312804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:35,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:35,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-18 00:34:35,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202058074] [2022-03-18 00:34:35,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:35,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-18 00:34:35,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:35,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-18 00:34:35,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:34:35,919 INFO L87 Difference]: Start difference. First operand 192 states and 232 transitions. Second operand has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 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) [2022-03-18 00:34:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:39,532 INFO L93 Difference]: Finished difference Result 200 states and 242 transitions. [2022-03-18 00:34:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 00:34:39,532 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 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 [2022-03-18 00:34:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:39,533 INFO L225 Difference]: With dead ends: 200 [2022-03-18 00:34:39,533 INFO L226 Difference]: Without dead ends: 195 [2022-03-18 00:34:39,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4481 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=14629, Invalid=23201, Unknown=0, NotChecked=0, Total=37830 [2022-03-18 00:34:39,534 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:39,535 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 38 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:34:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-18 00:34:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-03-18 00:34:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.2222222222222223) internal successors, (231), 189 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) [2022-03-18 00:34:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2022-03-18 00:34:39,557 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 191 [2022-03-18 00:34:39,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:39,557 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2022-03-18 00:34:39,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 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) [2022-03-18 00:34:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2022-03-18 00:34:39,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-18 00:34:39,558 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:39,558 INFO L500 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:39,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:39,772 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 [2022-03-18 00:34:39,772 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:39,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1688878061, now seen corresponding path program 179 times [2022-03-18 00:34:39,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:39,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1942151928] [2022-03-18 00:34:39,967 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:34:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1375293811, now seen corresponding path program 1 times [2022-03-18 00:34:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:39,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842197919] [2022-03-18 00:34:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:39,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:39,969 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:34:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:39,971 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:34:39,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1688878061, now seen corresponding path program 180 times [2022-03-18 00:34:39,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:39,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238650269] [2022-03-18 00:34:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:39,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:42,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:42,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:42,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238650269] [2022-03-18 00:34:42,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238650269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:42,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509302775] [2022-03-18 00:34:42,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:34:42,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:42,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:42,629 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) [2022-03-18 00:34:42,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-18 00:34:42,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-03-18 00:34:42,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:42,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 00:34:42,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 4186 proven. 2025 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2022-03-18 00:34:43,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 4186 proven. 2025 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2022-03-18 00:34:43,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509302775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:43,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:43,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 48, 48] total 103 [2022-03-18 00:34:43,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1942151928] [2022-03-18 00:34:43,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1942151928] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:43,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:43,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-18 00:34:43,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816442125] [2022-03-18 00:34:43,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:43,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-18 00:34:43,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:43,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-18 00:34:43,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:34:43,738 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 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) [2022-03-18 00:34:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:47,415 INFO L93 Difference]: Finished difference Result 202 states and 245 transitions. [2022-03-18 00:34:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-18 00:34:47,415 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 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 [2022-03-18 00:34:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:47,416 INFO L225 Difference]: With dead ends: 202 [2022-03-18 00:34:47,416 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 00:34:47,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 378 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4322 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=14629, Invalid=23201, Unknown=0, NotChecked=0, Total=37830 [2022-03-18 00:34:47,417 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 192 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:47,417 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 23 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:34:47,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 00:34:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-03-18 00:34:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.225130890052356) internal successors, (234), 191 states have internal predecessors, (234), 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) [2022-03-18 00:34:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 238 transitions. [2022-03-18 00:34:47,439 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 238 transitions. Word has length 193 [2022-03-18 00:34:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:47,440 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 238 transitions. [2022-03-18 00:34:47,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 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) [2022-03-18 00:34:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 238 transitions. [2022-03-18 00:34:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-18 00:34:47,441 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:47,441 INFO L500 BasicCegarLoop]: trace histogram [92, 50, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:47,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-18 00:34:47,654 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 [2022-03-18 00:34:47,654 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:47,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1555493550, now seen corresponding path program 181 times [2022-03-18 00:34:47,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:47,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1140240480] [2022-03-18 00:34:47,879 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:34:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1316188467, now seen corresponding path program 1 times [2022-03-18 00:34:47,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:47,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259413994] [2022-03-18 00:34:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:47,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:47,881 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:34:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:47,884 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:34:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1555493550, now seen corresponding path program 182 times [2022-03-18 00:34:47,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:47,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640873862] [2022-03-18 00:34:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:47,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:50,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:50,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:50,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640873862] [2022-03-18 00:34:50,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640873862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:50,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007427672] [2022-03-18 00:34:50,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:34:50,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:50,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:50,575 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) [2022-03-18 00:34:50,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-18 00:34:50,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:34:50,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:50,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-18 00:34:50,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:50,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:51,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007427672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:51,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:51,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 104 [2022-03-18 00:34:51,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:51,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1140240480] [2022-03-18 00:34:51,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1140240480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:51,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:51,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-18 00:34:51,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872616707] [2022-03-18 00:34:51,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:51,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-18 00:34:51,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-18 00:34:51,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:34:51,685 INFO L87 Difference]: Start difference. First operand 196 states and 238 transitions. Second operand has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 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) [2022-03-18 00:34:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:55,556 INFO L93 Difference]: Finished difference Result 204 states and 248 transitions. [2022-03-18 00:34:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-18 00:34:55,557 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 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 [2022-03-18 00:34:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:55,557 INFO L225 Difference]: With dead ends: 204 [2022-03-18 00:34:55,558 INFO L226 Difference]: Without dead ends: 199 [2022-03-18 00:34:55,559 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 383 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4666 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=14835, Invalid=23777, Unknown=0, NotChecked=0, Total=38612 [2022-03-18 00:34:55,559 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 194 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:55,559 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 43 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:34:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-18 00:34:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-03-18 00:34:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.2279792746113989) internal successors, (237), 193 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) [2022-03-18 00:34:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 241 transitions. [2022-03-18 00:34:55,586 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 241 transitions. Word has length 195 [2022-03-18 00:34:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:55,586 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 241 transitions. [2022-03-18 00:34:55,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 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) [2022-03-18 00:34:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 241 transitions. [2022-03-18 00:34:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-18 00:34:55,587 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:55,587 INFO L500 BasicCegarLoop]: trace histogram [93, 50, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:55,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:55,807 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 [2022-03-18 00:34:55,807 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1250354825, now seen corresponding path program 183 times [2022-03-18 00:34:55,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:55,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159246733] [2022-03-18 00:34:56,008 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:34:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1257083123, now seen corresponding path program 1 times [2022-03-18 00:34:56,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:56,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081370298] [2022-03-18 00:34:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:56,011 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:34:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:34:56,013 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:34:56,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1250354825, now seen corresponding path program 184 times [2022-03-18 00:34:56,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:56,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203076219] [2022-03-18 00:34:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:56,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:58,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:58,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:58,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203076219] [2022-03-18 00:34:58,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203076219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:58,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161885895] [2022-03-18 00:34:58,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:34:58,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:58,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:58,770 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) [2022-03-18 00:34:58,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-18 00:34:58,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:34:58,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:58,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 00:34:58,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:59,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:59,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161885895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:59,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:59,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 104 [2022-03-18 00:34:59,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:59,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159246733] [2022-03-18 00:34:59,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159246733] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:59,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:59,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-18 00:34:59,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300652811] [2022-03-18 00:34:59,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:59,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-18 00:34:59,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:59,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-18 00:34:59,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:34:59,841 INFO L87 Difference]: Start difference. First operand 198 states and 241 transitions. Second operand has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 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) [2022-03-18 00:35:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:03,674 INFO L93 Difference]: Finished difference Result 206 states and 251 transitions. [2022-03-18 00:35:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-18 00:35:03,675 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 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 [2022-03-18 00:35:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:03,676 INFO L225 Difference]: With dead ends: 206 [2022-03-18 00:35:03,676 INFO L226 Difference]: Without dead ends: 201 [2022-03-18 00:35:03,677 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=14938, Invalid=24068, Unknown=0, NotChecked=0, Total=39006 [2022-03-18 00:35:03,678 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 196 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:03,678 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 33 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:35:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-18 00:35:03,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-03-18 00:35:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.2307692307692308) internal successors, (240), 195 states have internal predecessors, (240), 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) [2022-03-18 00:35:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2022-03-18 00:35:03,701 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 197 [2022-03-18 00:35:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:03,701 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2022-03-18 00:35:03,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 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) [2022-03-18 00:35:03,702 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2022-03-18 00:35:03,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-18 00:35:03,702 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:03,702 INFO L500 BasicCegarLoop]: trace histogram [94, 50, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:03,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-18 00:35:03,902 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 [2022-03-18 00:35:03,903 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:03,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:03,903 INFO L85 PathProgramCache]: Analyzing trace with hash 69816228, now seen corresponding path program 185 times [2022-03-18 00:35:03,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:03,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [682111680] [2022-03-18 00:35:04,147 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:35:04,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1197977779, now seen corresponding path program 1 times [2022-03-18 00:35:04,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:04,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041431108] [2022-03-18 00:35:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:04,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:04,150 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:35:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:04,152 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:35:04,152 INFO L85 PathProgramCache]: Analyzing trace with hash 69816228, now seen corresponding path program 186 times [2022-03-18 00:35:04,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:04,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708653233] [2022-03-18 00:35:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:04,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:06,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:06,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:06,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708653233] [2022-03-18 00:35:06,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708653233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:06,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811685860] [2022-03-18 00:35:06,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:35:06,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:06,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:06,967 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) [2022-03-18 00:35:06,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-18 00:35:07,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-03-18 00:35:07,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 00:35:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 4465 proven. 2209 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-03-18 00:35:07,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 4465 proven. 2209 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-03-18 00:35:07,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811685860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:07,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:07,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 50, 50] total 103 [2022-03-18 00:35:07,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:07,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [682111680] [2022-03-18 00:35:07,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [682111680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:07,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:07,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-18 00:35:07,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023580268] [2022-03-18 00:35:07,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:07,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-18 00:35:07,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:07,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-18 00:35:07,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:35:07,940 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 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) [2022-03-18 00:35:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:11,879 INFO L93 Difference]: Finished difference Result 208 states and 254 transitions. [2022-03-18 00:35:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-18 00:35:11,879 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 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 [2022-03-18 00:35:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:11,880 INFO L225 Difference]: With dead ends: 208 [2022-03-18 00:35:11,880 INFO L226 Difference]: Without dead ends: 203 [2022-03-18 00:35:11,881 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 393 SyntacticMatches, 2 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4605 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=14938, Invalid=24068, Unknown=0, NotChecked=0, Total=39006 [2022-03-18 00:35:11,881 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 198 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:11,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 43 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [722 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:35:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-18 00:35:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-03-18 00:35:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.233502538071066) internal successors, (243), 197 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) [2022-03-18 00:35:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 247 transitions. [2022-03-18 00:35:11,905 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 247 transitions. Word has length 199 [2022-03-18 00:35:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:11,906 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 247 transitions. [2022-03-18 00:35:11,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 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) [2022-03-18 00:35:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 247 transitions. [2022-03-18 00:35:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-18 00:35:11,906 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:11,906 INFO L500 BasicCegarLoop]: trace histogram [95, 50, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:11,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-18 00:35:12,107 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 [2022-03-18 00:35:12,107 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:12,107 INFO L85 PathProgramCache]: Analyzing trace with hash -556409345, now seen corresponding path program 187 times [2022-03-18 00:35:12,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:12,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1665228562] [2022-03-18 00:35:12,298 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:35:12,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1138872435, now seen corresponding path program 1 times [2022-03-18 00:35:12,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:12,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353731466] [2022-03-18 00:35:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:12,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:12,300 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:35:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:12,301 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:35:12,301 INFO L85 PathProgramCache]: Analyzing trace with hash -556409345, now seen corresponding path program 188 times [2022-03-18 00:35:12,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:12,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964344741] [2022-03-18 00:35:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:12,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:15,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:15,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:15,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964344741] [2022-03-18 00:35:15,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964344741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:15,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234223305] [2022-03-18 00:35:15,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:35:15,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:15,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:15,185 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) [2022-03-18 00:35:15,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-18 00:35:15,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:35:15,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:15,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-18 00:35:15,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:15,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:16,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234223305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:16,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:16,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 104 [2022-03-18 00:35:16,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:16,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1665228562] [2022-03-18 00:35:16,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1665228562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:16,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:16,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-18 00:35:16,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399700289] [2022-03-18 00:35:16,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:16,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-18 00:35:16,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-18 00:35:16,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:35:16,139 INFO L87 Difference]: Start difference. First operand 202 states and 247 transitions. Second operand has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 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) [2022-03-18 00:35:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:20,191 INFO L93 Difference]: Finished difference Result 210 states and 257 transitions. [2022-03-18 00:35:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-18 00:35:20,191 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 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 [2022-03-18 00:35:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:20,192 INFO L225 Difference]: With dead ends: 210 [2022-03-18 00:35:20,192 INFO L226 Difference]: Without dead ends: 205 [2022-03-18 00:35:20,193 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 398 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=15144, Invalid=24656, Unknown=0, NotChecked=0, Total=39800 [2022-03-18 00:35:20,194 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 200 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:20,194 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 48 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:35:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-18 00:35:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-03-18 00:35:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.236180904522613) internal successors, (246), 199 states have internal predecessors, (246), 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) [2022-03-18 00:35:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 250 transitions. [2022-03-18 00:35:20,211 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 250 transitions. Word has length 201 [2022-03-18 00:35:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:20,211 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 250 transitions. [2022-03-18 00:35:20,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 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) [2022-03-18 00:35:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 250 transitions. [2022-03-18 00:35:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-18 00:35:20,212 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:20,212 INFO L500 BasicCegarLoop]: trace histogram [96, 50, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:20,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-18 00:35:20,412 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 [2022-03-18 00:35:20,412 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:20,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:20,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1063763558, now seen corresponding path program 189 times [2022-03-18 00:35:20,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:20,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [966107771] [2022-03-18 00:35:20,587 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:35:20,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1079767091, now seen corresponding path program 1 times [2022-03-18 00:35:20,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:20,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287996789] [2022-03-18 00:35:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:20,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:20,590 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:35:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:20,592 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:35:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1063763558, now seen corresponding path program 190 times [2022-03-18 00:35:20,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:20,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013666710] [2022-03-18 00:35:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:20,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:23,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:23,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013666710] [2022-03-18 00:35:23,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013666710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689619469] [2022-03-18 00:35:23,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:35:23,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:23,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:23,594 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) [2022-03-18 00:35:23,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-18 00:35:23,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:35:23,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-18 00:35:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:23,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:24,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689619469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:24,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:24,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 104 [2022-03-18 00:35:24,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:24,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [966107771] [2022-03-18 00:35:24,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [966107771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:24,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:24,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-18 00:35:24,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150421316] [2022-03-18 00:35:24,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:24,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-18 00:35:24,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:24,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-18 00:35:24,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:35:24,508 INFO L87 Difference]: Start difference. First operand 204 states and 250 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 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) [2022-03-18 00:35:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:28,615 INFO L93 Difference]: Finished difference Result 212 states and 260 transitions. [2022-03-18 00:35:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-18 00:35:28,616 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 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 [2022-03-18 00:35:28,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:28,616 INFO L225 Difference]: With dead ends: 212 [2022-03-18 00:35:28,616 INFO L226 Difference]: Without dead ends: 207 [2022-03-18 00:35:28,618 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 403 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15247, Invalid=24953, Unknown=0, NotChecked=0, Total=40200 [2022-03-18 00:35:28,618 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 202 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:28,618 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 38 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:35:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-18 00:35:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-03-18 00:35:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.2388059701492538) internal successors, (249), 201 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) [2022-03-18 00:35:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 253 transitions. [2022-03-18 00:35:28,644 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 253 transitions. Word has length 203 [2022-03-18 00:35:28,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:28,644 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 253 transitions. [2022-03-18 00:35:28,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 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) [2022-03-18 00:35:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 253 transitions. [2022-03-18 00:35:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-18 00:35:28,645 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:28,645 INFO L500 BasicCegarLoop]: trace histogram [97, 50, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:28,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-18 00:35:28,845 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 [2022-03-18 00:35:28,846 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash 995109493, now seen corresponding path program 191 times [2022-03-18 00:35:28,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:28,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [411388678] [2022-03-18 00:35:29,096 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:35:29,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1020661747, now seen corresponding path program 1 times [2022-03-18 00:35:29,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:29,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106905150] [2022-03-18 00:35:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:29,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:29,098 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:35:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:29,099 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:35:29,099 INFO L85 PathProgramCache]: Analyzing trace with hash 995109493, now seen corresponding path program 192 times [2022-03-18 00:35:29,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:29,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648845074] [2022-03-18 00:35:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:29,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:32,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:32,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:32,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648845074] [2022-03-18 00:35:32,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648845074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171685869] [2022-03-18 00:35:32,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:35:32,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:32,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:32,102 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) [2022-03-18 00:35:32,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-18 00:35:32,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2022-03-18 00:35:32,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:32,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 00:35:32,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 4753 proven. 2304 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2022-03-18 00:35:32,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 4753 proven. 2304 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2022-03-18 00:35:32,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171685869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:32,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:32,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 51, 51] total 103 [2022-03-18 00:35:32,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:32,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [411388678] [2022-03-18 00:35:32,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [411388678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:32,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:32,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-18 00:35:32,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745250710] [2022-03-18 00:35:32,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:32,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-18 00:35:32,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:32,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-18 00:35:32,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:35:32,916 INFO L87 Difference]: Start difference. First operand 206 states and 253 transitions. Second operand has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 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) [2022-03-18 00:35:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:37,057 INFO L93 Difference]: Finished difference Result 214 states and 263 transitions. [2022-03-18 00:35:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-18 00:35:37,058 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 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 [2022-03-18 00:35:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:37,059 INFO L225 Difference]: With dead ends: 214 [2022-03-18 00:35:37,059 INFO L226 Difference]: Without dead ends: 209 [2022-03-18 00:35:37,060 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 408 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4898 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15247, Invalid=24953, Unknown=0, NotChecked=0, Total=40200 [2022-03-18 00:35:37,060 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 204 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:37,060 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 43 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:35:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-18 00:35:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-03-18 00:35:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.2413793103448276) internal successors, (252), 203 states have internal predecessors, (252), 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) [2022-03-18 00:35:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 256 transitions. [2022-03-18 00:35:37,081 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 256 transitions. Word has length 205 [2022-03-18 00:35:37,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:37,081 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 256 transitions. [2022-03-18 00:35:37,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 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) [2022-03-18 00:35:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 256 transitions. [2022-03-18 00:35:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-18 00:35:37,082 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:37,082 INFO L500 BasicCegarLoop]: trace histogram [98, 50, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:37,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-18 00:35:37,291 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 [2022-03-18 00:35:37,291 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:37,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:37,292 INFO L85 PathProgramCache]: Analyzing trace with hash -407811952, now seen corresponding path program 193 times [2022-03-18 00:35:37,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:37,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327217609] [2022-03-18 00:35:37,535 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:35:37,536 INFO L85 PathProgramCache]: Analyzing trace with hash -961556403, now seen corresponding path program 1 times [2022-03-18 00:35:37,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:37,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863063828] [2022-03-18 00:35:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:37,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:37,538 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:35:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:37,540 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:35:37,540 INFO L85 PathProgramCache]: Analyzing trace with hash -407811952, now seen corresponding path program 194 times [2022-03-18 00:35:37,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:37,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888853814] [2022-03-18 00:35:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:37,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:40,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:40,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:40,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888853814] [2022-03-18 00:35:40,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888853814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:40,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871704135] [2022-03-18 00:35:40,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:35:40,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:40,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:40,615 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) [2022-03-18 00:35:40,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-18 00:35:40,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:35:40,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:40,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-18 00:35:40,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:40,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:41,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871704135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:41,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:41,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 104 [2022-03-18 00:35:41,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:41,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327217609] [2022-03-18 00:35:41,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327217609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:41,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:41,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-18 00:35:41,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696737596] [2022-03-18 00:35:41,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:41,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-18 00:35:41,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:41,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-18 00:35:41,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:35:41,422 INFO L87 Difference]: Start difference. First operand 208 states and 256 transitions. Second operand has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 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) [2022-03-18 00:35:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:45,731 INFO L93 Difference]: Finished difference Result 216 states and 266 transitions. [2022-03-18 00:35:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-18 00:35:45,732 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 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 [2022-03-18 00:35:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:45,732 INFO L225 Difference]: With dead ends: 216 [2022-03-18 00:35:45,732 INFO L226 Difference]: Without dead ends: 211 [2022-03-18 00:35:45,734 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 413 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-03-18 00:35:45,735 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:45,735 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 23 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [803 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:35:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-18 00:35:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-03-18 00:35:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.2439024390243902) internal successors, (255), 205 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) [2022-03-18 00:35:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 259 transitions. [2022-03-18 00:35:45,756 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 259 transitions. Word has length 207 [2022-03-18 00:35:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:45,756 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 259 transitions. [2022-03-18 00:35:45,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 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) [2022-03-18 00:35:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 259 transitions. [2022-03-18 00:35:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-18 00:35:45,757 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:45,757 INFO L500 BasicCegarLoop]: trace histogram [99, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:45,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-18 00:35:45,958 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 [2022-03-18 00:35:45,959 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:45,959 INFO L85 PathProgramCache]: Analyzing trace with hash 4410347, now seen corresponding path program 195 times [2022-03-18 00:35:45,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:45,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1166868668] [2022-03-18 00:35:46,159 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:35:46,159 INFO L85 PathProgramCache]: Analyzing trace with hash -902451059, now seen corresponding path program 1 times [2022-03-18 00:35:46,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:46,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238221369] [2022-03-18 00:35:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:46,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:46,162 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:35:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:46,163 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:35:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash 4410347, now seen corresponding path program 196 times [2022-03-18 00:35:46,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:46,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747178128] [2022-03-18 00:35:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:46,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:49,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:49,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:49,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747178128] [2022-03-18 00:35:49,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747178128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:49,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081854858] [2022-03-18 00:35:49,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:35:49,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:49,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:49,257 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) [2022-03-18 00:35:49,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-18 00:35:49,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:35:49,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:49,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-18 00:35:49,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:49,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:50,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081854858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:50,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:50,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 104 [2022-03-18 00:35:50,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:50,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1166868668] [2022-03-18 00:35:50,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1166868668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:50,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:50,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-18 00:35:50,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801963277] [2022-03-18 00:35:50,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:50,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-18 00:35:50,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:50,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-18 00:35:50,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:35:50,010 INFO L87 Difference]: Start difference. First operand 210 states and 259 transitions. Second operand has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 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) [2022-03-18 00:35:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:54,400 INFO L93 Difference]: Finished difference Result 217 states and 267 transitions. [2022-03-18 00:35:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-18 00:35:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 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 [2022-03-18 00:35:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:54,401 INFO L225 Difference]: With dead ends: 217 [2022-03-18 00:35:54,401 INFO L226 Difference]: Without dead ends: 212 [2022-03-18 00:35:54,403 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 418 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2022-03-18 00:35:54,403 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:54,403 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 38 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:35:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-18 00:35:54,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-18 00:35:54,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2463768115942029) internal successors, (258), 207 states have internal predecessors, (258), 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) [2022-03-18 00:35:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 262 transitions. [2022-03-18 00:35:54,433 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 262 transitions. Word has length 209 [2022-03-18 00:35:54,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:54,434 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 262 transitions. [2022-03-18 00:35:54,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 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) [2022-03-18 00:35:54,434 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 262 transitions. [2022-03-18 00:35:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-18 00:35:54,435 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:54,435 INFO L500 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:54,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-18 00:35:54,657 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 [2022-03-18 00:35:54,658 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:54,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1013048454, now seen corresponding path program 197 times [2022-03-18 00:35:54,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:54,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [92804915] [2022-03-18 00:35:54,863 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:35:54,863 INFO L85 PathProgramCache]: Analyzing trace with hash -843345715, now seen corresponding path program 1 times [2022-03-18 00:35:54,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:54,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112337978] [2022-03-18 00:35:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:54,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:54,865 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:35:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:35:54,866 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:35:54,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1013048454, now seen corresponding path program 198 times [2022-03-18 00:35:54,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:54,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130624734] [2022-03-18 00:35:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:54,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:56,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 00:35:56,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:56,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130624734] [2022-03-18 00:35:56,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130624734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:56,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997446306] [2022-03-18 00:35:56,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:35:56,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:56,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:56,195 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) [2022-03-18 00:35:56,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-18 00:35:56,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2022-03-18 00:35:56,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:56,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-18 00:35:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 00:35:57,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 00:35:58,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997446306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:58,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:58,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 58 [2022-03-18 00:35:58,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:58,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [92804915] [2022-03-18 00:35:58,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [92804915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:58,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:58,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-18 00:35:58,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451378933] [2022-03-18 00:35:58,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:58,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 00:35:58,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:58,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 00:35:58,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 00:35:58,044 INFO L87 Difference]: Start difference. First operand 212 states and 262 transitions. Second operand has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 54 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:02,229 INFO L93 Difference]: Finished difference Result 2868 states and 4243 transitions. [2022-03-18 00:36:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 00:36:02,230 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 54 states have internal predecessors, (108), 2 states have call successors, (3), 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 [2022-03-18 00:36:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:02,234 INFO L225 Difference]: With dead ends: 2868 [2022-03-18 00:36:02,234 INFO L226 Difference]: Without dead ends: 2863 [2022-03-18 00:36:02,235 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 417 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=329, Invalid=11881, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 00:36:02,235 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 164 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 8327 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 8381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 8327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:02,235 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 379 Invalid, 8381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 8327 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-18 00:36:02,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-03-18 00:36:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 214. [2022-03-18 00:36:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.2488038277511961) internal successors, (261), 209 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) [2022-03-18 00:36:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 265 transitions. [2022-03-18 00:36:02,312 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 265 transitions. Word has length 211 [2022-03-18 00:36:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:02,312 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 265 transitions. [2022-03-18 00:36:02,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 54 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:02,312 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 265 transitions. [2022-03-18 00:36:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-18 00:36:02,313 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:36:02,313 INFO L500 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:36:02,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-18 00:36:02,514 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 [2022-03-18 00:36:02,514 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:36:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:36:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash -348339615, now seen corresponding path program 199 times [2022-03-18 00:36:02,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:02,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2074070056] [2022-03-18 00:36:02,750 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation OVERAPPROXIMATION [2022-03-18 00:36:02,750 INFO L85 PathProgramCache]: Analyzing trace with hash -784240371, now seen corresponding path program 1 times [2022-03-18 00:36:02,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:02,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257600059] [2022-03-18 00:36:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:02,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:36:02,760 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:36:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:36:02,766 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:36:02,767 INFO L85 PathProgramCache]: Analyzing trace with hash -348339615, now seen corresponding path program 200 times [2022-03-18 00:36:02,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:02,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045138399] [2022-03-18 00:36:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:02,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:03,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:36:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-03-18 00:36:03,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:36:03,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045138399] [2022-03-18 00:36:03,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045138399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:03,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:03,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 00:36:03,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:03,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2074070056] [2022-03-18 00:36:03,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2074070056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:03,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:03,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 00:36:03,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002723102] [2022-03-18 00:36:03,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:03,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 00:36:03,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 00:36:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 00:36:03,700 INFO L87 Difference]: Start difference. First operand 214 states and 265 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:04,579 INFO L93 Difference]: Finished difference Result 313 states and 413 transitions. [2022-03-18 00:36:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 00:36:04,579 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 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 [2022-03-18 00:36:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:04,580 INFO L225 Difference]: With dead ends: 313 [2022-03-18 00:36:04,580 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 00:36:04,581 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:36:04,581 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:04,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 41 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:36:04,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 00:36:04,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 00:36:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 00:36:04,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 00:36:04,582 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 213 [2022-03-18 00:36:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:04,582 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 00:36:04,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 00:36:04,582 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 00:36:04,585 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 00:36:04,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,SelfDestructingSolverStorable202 [2022-03-18 00:36:04,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.