/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 02:53:26,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 02:53:26,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 02:53:26,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 02:53:26,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 02:53:26,387 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 02:53:26,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 02:53:26,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 02:53:26,388 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 02:53:26,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 02:53:26,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 02:53:26,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 02:53:26,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 02:53:26,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 02:53:26,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 02:53:26,390 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 02:53:26,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 02:53:26,390 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 02:53:26,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 02:53:26,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 02:53:26,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 02:53:26,391 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 02:53:26,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 02:53:26,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:53:26,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 02:53:26,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 02:53:26,392 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 02:53:26,392 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 02:53:26,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 02:53:26,392 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 02:53:26,392 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 02:53:26,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 02:53:26,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 02:53:26,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 02:53:26,631 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 02:53:26,632 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 02:53:26,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-19 02:53:26,707 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67b2c987/315fbc19241142b2b958ed966838ab6f/FLAGa5d3f51f1 [2022-03-19 02:53:27,077 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 02:53:27,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-19 02:53:27,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67b2c987/315fbc19241142b2b958ed966838ab6f/FLAGa5d3f51f1 [2022-03-19 02:53:27,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67b2c987/315fbc19241142b2b958ed966838ab6f [2022-03-19 02:53:27,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 02:53:27,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 02:53:27,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 02:53:27,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 02:53:27,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 02:53:27,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:53:27" (1/1) ... [2022-03-19 02:53:27,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54feaa19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:53:27, skipping insertion in model container [2022-03-19 02:53:27,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:53:27" (1/1) ... [2022-03-19 02:53:27,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 02:53:27,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 02:53:27,731 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-19 02:53:27,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:53:27,757 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 02:53:27,771 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-19 02:53:27,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:53:27,782 INFO L208 MainTranslator]: Completed translation [2022-03-19 02:53:27,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:53:27 WrapperNode [2022-03-19 02:53:27,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 02:53:27,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 02:53:27,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 02:53:27,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 02:53:27,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:53:27" (1/1) ... [2022-03-19 02:53:27,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:53:27" (1/1) ... [2022-03-19 02:53:27,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:53:27" (1/1) ... [2022-03-19 02:53:27,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:53:27" (1/1) ... [2022-03-19 02:53:27,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:53:27" (1/1) ... [2022-03-19 02:53:27,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:53:27" (1/1) ... [2022-03-19 02:53:27,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:53:27" (1/1) ... [2022-03-19 02:53:27,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 02:53:27,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 02:53:27,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 02:53:27,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 02:53:27,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:53:27" (1/1) ... [2022-03-19 02:53:27,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:53:27,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:27,842 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 02:53:27,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 02:53:27,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 02:53:27,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 02:53:27,884 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 02:53:27,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 02:53:27,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 02:53:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 02:53:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 02:53:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 02:53:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 02:53:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 02:53:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 02:53:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 02:53:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 02:53:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 02:53:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 02:53:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 02:53:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 02:53:27,933 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 02:53:27,934 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 02:53:27,992 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 02:53:27,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 02:53:27,997 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 02:53:27,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:53:27 BoogieIcfgContainer [2022-03-19 02:53:27,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 02:53:28,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 02:53:28,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 02:53:28,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 02:53:28,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 02:53:27" (1/3) ... [2022-03-19 02:53:28,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4047ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:53:28, skipping insertion in model container [2022-03-19 02:53:28,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:53:27" (2/3) ... [2022-03-19 02:53:28,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4047ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:53:28, skipping insertion in model container [2022-03-19 02:53:28,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:53:27" (3/3) ... [2022-03-19 02:53:28,006 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2022-03-19 02:53:28,010 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 02:53:28,010 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 02:53:28,045 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 02:53:28,070 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 02:53:28,070 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 02:53:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:53:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 02:53:28,096 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:28,096 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:28,097 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:28,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 1 times [2022-03-19 02:53:28,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:28,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1938715074] [2022-03-19 02:53:28,135 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:53:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 2 times [2022-03-19 02:53:28,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:28,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988566413] [2022-03-19 02:53:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:28,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:28,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:28,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:28,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988566413] [2022-03-19 02:53:28,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988566413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:28,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:28,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:53:28,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1938715074] [2022-03-19 02:53:28,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1938715074] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:28,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:28,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:53:28,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570681040] [2022-03-19 02:53:28,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:28,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 02:53:28,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:28,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 02:53:28,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 02:53:28,299 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:28,348 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-19 02:53:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 02:53:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 02:53:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:28,359 INFO L225 Difference]: With dead ends: 32 [2022-03-19 02:53:28,359 INFO L226 Difference]: Without dead ends: 13 [2022-03-19 02:53:28,362 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 02:53:28,368 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:28,369 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:53:28,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-19 02:53:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-19 02:53:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-19 02:53:28,393 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-19 02:53:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:28,393 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-19 02:53:28,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:28,393 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-19 02:53:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 02:53:28,394 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:28,394 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:28,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 02:53:28,395 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:28,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-03-19 02:53:28,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:28,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [287856881] [2022-03-19 02:53:28,402 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:53:28,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 2 times [2022-03-19 02:53:28,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:28,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123205456] [2022-03-19 02:53:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:28,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:28,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:28,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:28,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123205456] [2022-03-19 02:53:28,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123205456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:28,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:28,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:53:28,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:28,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [287856881] [2022-03-19 02:53:28,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [287856881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:28,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:28,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 02:53:28,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525918694] [2022-03-19 02:53:28,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:28,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 02:53:28,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:28,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 02:53:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 02:53:28,506 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:28,560 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-19 02:53:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 02:53:28,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 02:53:28,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:28,563 INFO L225 Difference]: With dead ends: 22 [2022-03-19 02:53:28,563 INFO L226 Difference]: Without dead ends: 15 [2022-03-19 02:53:28,563 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 02:53:28,565 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:28,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:53:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-19 02:53:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-19 02:53:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-19 02:53:28,570 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-19 02:53:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:28,574 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-19 02:53:28,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:28,575 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-19 02:53:28,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 02:53:28,575 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:28,575 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:28,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 02:53:28,576 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:28,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1372110560, now seen corresponding path program 1 times [2022-03-19 02:53:28,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:28,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [199757409] [2022-03-19 02:53:28,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:28,680 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:28,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1209153456, now seen corresponding path program 1 times [2022-03-19 02:53:28,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:28,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216034927] [2022-03-19 02:53:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:28,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:28,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:28,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:28,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216034927] [2022-03-19 02:53:28,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216034927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:28,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:28,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:53:28,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:28,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [199757409] [2022-03-19 02:53:28,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [199757409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:28,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:28,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:53:28,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739189132] [2022-03-19 02:53:28,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:28,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:53:28,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:28,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:53:28,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-19 02:53:28,871 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:28,933 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-19 02:53:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 02:53:28,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-19 02:53:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:28,936 INFO L225 Difference]: With dead ends: 22 [2022-03-19 02:53:28,936 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 02:53:28,937 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-19 02:53:28,940 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:28,945 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:53:28,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 02:53:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-19 02:53:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-19 02:53:28,952 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-03-19 02:53:28,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:28,953 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-19 02:53:28,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-19 02:53:28,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 02:53:28,953 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:28,953 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:28,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 02:53:28,954 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:28,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 1 times [2022-03-19 02:53:28,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:28,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1194503790] [2022-03-19 02:53:29,006 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:29,087 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:29,087 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:29,088 INFO L85 PathProgramCache]: Analyzing trace with hash 603671471, now seen corresponding path program 1 times [2022-03-19 02:53:29,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:29,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292221665] [2022-03-19 02:53:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:29,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:29,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:29,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:29,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292221665] [2022-03-19 02:53:29,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292221665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:29,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525360513] [2022-03-19 02:53:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:29,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:29,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:29,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:29,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 02:53:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:29,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:29,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:29,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:29,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525360513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:29,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:29,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:29,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:29,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1194503790] [2022-03-19 02:53:29,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1194503790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:29,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:29,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:53:29,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243192092] [2022-03-19 02:53:29,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:29,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:53:29,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:29,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:53:29,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-03-19 02:53:29,982 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:30,131 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-03-19 02:53:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:53:30,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 02:53:30,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:30,132 INFO L225 Difference]: With dead ends: 31 [2022-03-19 02:53:30,132 INFO L226 Difference]: Without dead ends: 21 [2022-03-19 02:53:30,133 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-03-19 02:53:30,148 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:30,149 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 36 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:53:30,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-19 02:53:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-19 02:53:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-03-19 02:53:30,155 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2022-03-19 02:53:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:30,155 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-03-19 02:53:30,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-03-19 02:53:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 02:53:30,156 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:30,156 INFO L500 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:30,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 02:53:30,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:30,364 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:30,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:30,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1662437453, now seen corresponding path program 2 times [2022-03-19 02:53:30,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:30,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [41518722] [2022-03-19 02:53:30,402 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:30,455 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:30,456 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:30,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1641763665, now seen corresponding path program 1 times [2022-03-19 02:53:30,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:30,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024639016] [2022-03-19 02:53:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:30,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:30,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:30,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:30,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024639016] [2022-03-19 02:53:30,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024639016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:30,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45210371] [2022-03-19 02:53:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:30,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:30,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:30,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:30,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 02:53:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:30,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:30,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:30,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:31,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45210371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:31,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:31,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:31,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [41518722] [2022-03-19 02:53:31,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [41518722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:31,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:31,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 02:53:31,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833117225] [2022-03-19 02:53:31,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:31,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 02:53:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 02:53:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-19 02:53:31,173 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:31,287 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-03-19 02:53:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 02:53:31,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-19 02:53:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:31,289 INFO L225 Difference]: With dead ends: 30 [2022-03-19 02:53:31,289 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 02:53:31,289 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-03-19 02:53:31,290 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:31,290 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 38 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:53:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 02:53:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-19 02:53:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-03-19 02:53:31,296 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2022-03-19 02:53:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:31,296 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-03-19 02:53:31,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-03-19 02:53:31,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 02:53:31,297 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:31,297 INFO L500 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:31,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 02:53:31,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:31,512 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash 361874638, now seen corresponding path program 3 times [2022-03-19 02:53:31,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:31,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [180188238] [2022-03-19 02:53:31,542 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:31,603 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:31,603 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash 407768495, now seen corresponding path program 1 times [2022-03-19 02:53:31,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:31,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958646641] [2022-03-19 02:53:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:31,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:31,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:31,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:31,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958646641] [2022-03-19 02:53:31,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958646641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:31,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209365029] [2022-03-19 02:53:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:31,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:31,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:31,712 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:31,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 02:53:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:31,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:31,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:31,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:32,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209365029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:32,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:32,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:32,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:32,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [180188238] [2022-03-19 02:53:32,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [180188238] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:32,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:32,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:53:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747523440] [2022-03-19 02:53:32,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:32,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:53:32,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:53:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-03-19 02:53:32,260 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:32,443 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-03-19 02:53:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:53:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 02:53:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:32,444 INFO L225 Difference]: With dead ends: 32 [2022-03-19 02:53:32,445 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 02:53:32,445 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2022-03-19 02:53:32,446 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:32,446 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 53 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:53:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 02:53:32,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-19 02:53:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-19 02:53:32,450 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-03-19 02:53:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:32,451 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-19 02:53:32,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-19 02:53:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 02:53:32,451 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:32,451 INFO L500 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:32,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:32,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:32,652 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash 105609001, now seen corresponding path program 4 times [2022-03-19 02:53:32,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:32,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [352024689] [2022-03-19 02:53:32,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:32,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:32,746 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:32,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1837666641, now seen corresponding path program 1 times [2022-03-19 02:53:32,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:32,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325878806] [2022-03-19 02:53:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:32,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:32,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:32,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:32,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325878806] [2022-03-19 02:53:32,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325878806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:32,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783716227] [2022-03-19 02:53:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:32,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:32,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:32,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:32,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 02:53:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:32,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:32,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:33,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:33,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783716227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:33,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:33,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:33,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:33,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [352024689] [2022-03-19 02:53:33,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [352024689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:33,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:33,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 02:53:33,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027161679] [2022-03-19 02:53:33,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:33,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 02:53:33,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:33,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 02:53:33,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:53:33,342 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:33,533 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-03-19 02:53:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 02:53:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 02:53:33,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:33,534 INFO L225 Difference]: With dead ends: 34 [2022-03-19 02:53:33,534 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 02:53:33,535 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2022-03-19 02:53:33,535 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:33,536 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:53:33,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 02:53:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-19 02:53:33,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-19 02:53:33,541 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-19 02:53:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:33,541 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-19 02:53:33,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:33,541 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-19 02:53:33,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 02:53:33,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:33,542 INFO L500 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:33,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:33,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:33,755 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1352532284, now seen corresponding path program 5 times [2022-03-19 02:53:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:33,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1252870552] [2022-03-19 02:53:33,782 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:33,839 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:33,839 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:33,841 INFO L85 PathProgramCache]: Analyzing trace with hash 211865519, now seen corresponding path program 1 times [2022-03-19 02:53:33,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:33,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413910179] [2022-03-19 02:53:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:33,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:33,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:33,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:33,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413910179] [2022-03-19 02:53:33,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413910179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:33,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543765245] [2022-03-19 02:53:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:33,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:33,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:33,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:33,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 02:53:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:33,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:33,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:34,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:34,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543765245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:34,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:34,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-19 02:53:34,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:34,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1252870552] [2022-03-19 02:53:34,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1252870552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:34,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:34,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 02:53:34,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153221041] [2022-03-19 02:53:34,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:34,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 02:53:34,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:34,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 02:53:34,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-03-19 02:53:34,464 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:34,657 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-03-19 02:53:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:53:34,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-19 02:53:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:34,658 INFO L225 Difference]: With dead ends: 36 [2022-03-19 02:53:34,659 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 02:53:34,659 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2022-03-19 02:53:34,660 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:34,660 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 33 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:53:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 02:53:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-19 02:53:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-03-19 02:53:34,665 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-03-19 02:53:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:34,666 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-03-19 02:53:34,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-03-19 02:53:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 02:53:34,666 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:34,667 INFO L500 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:34,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:34,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:34,875 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1827998623, now seen corresponding path program 6 times [2022-03-19 02:53:34,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:34,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1853807851] [2022-03-19 02:53:34,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:34,950 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:34,951 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:34,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2033569617, now seen corresponding path program 1 times [2022-03-19 02:53:34,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:34,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556387792] [2022-03-19 02:53:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:34,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:35,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:35,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:35,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556387792] [2022-03-19 02:53:35,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556387792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:35,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037555345] [2022-03-19 02:53:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:35,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:35,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:35,030 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:35,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 02:53:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:35,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:35,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:35,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:35,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037555345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:35,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:35,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:35,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:35,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1853807851] [2022-03-19 02:53:35,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1853807851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:35,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:35,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 02:53:35,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057070213] [2022-03-19 02:53:35,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:35,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 02:53:35,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:35,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 02:53:35,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-03-19 02:53:35,609 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:35,829 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-03-19 02:53:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 02:53:35,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 02:53:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:35,830 INFO L225 Difference]: With dead ends: 38 [2022-03-19 02:53:35,831 INFO L226 Difference]: Without dead ends: 31 [2022-03-19 02:53:35,831 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 02:53:35,832 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:35,832 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 53 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:53:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-19 02:53:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-19 02:53:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-19 02:53:35,837 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2022-03-19 02:53:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:35,837 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-19 02:53:35,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-19 02:53:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 02:53:35,838 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:35,838 INFO L500 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:35,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:36,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:36,053 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash 301485498, now seen corresponding path program 7 times [2022-03-19 02:53:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:36,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [992518010] [2022-03-19 02:53:36,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:36,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:36,138 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:36,138 INFO L85 PathProgramCache]: Analyzing trace with hash 15962543, now seen corresponding path program 1 times [2022-03-19 02:53:36,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:36,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092977343] [2022-03-19 02:53:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:36,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:36,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:36,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:36,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092977343] [2022-03-19 02:53:36,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092977343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:36,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384046997] [2022-03-19 02:53:36,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:36,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:36,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:36,251 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:36,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 02:53:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:36,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:36,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:36,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:36,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384046997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:36,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:36,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:36,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:36,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [992518010] [2022-03-19 02:53:36,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [992518010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:36,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:36,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 02:53:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212349203] [2022-03-19 02:53:36,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:36,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 02:53:36,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:36,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 02:53:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-03-19 02:53:36,882 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:37,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:37,162 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-03-19 02:53:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 02:53:37,162 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 02:53:37,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:37,163 INFO L225 Difference]: With dead ends: 40 [2022-03-19 02:53:37,163 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 02:53:37,164 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 02:53:37,165 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:37,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:53:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 02:53:37,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 02:53:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-19 02:53:37,170 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2022-03-19 02:53:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:37,170 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-19 02:53:37,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-19 02:53:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 02:53:37,171 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:37,171 INFO L500 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:37,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:37,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:37,387 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:37,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2093779691, now seen corresponding path program 8 times [2022-03-19 02:53:37,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:37,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1938037659] [2022-03-19 02:53:37,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:37,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:37,466 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2065494703, now seen corresponding path program 1 times [2022-03-19 02:53:37,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:37,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314361156] [2022-03-19 02:53:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:37,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:37,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:37,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314361156] [2022-03-19 02:53:37,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314361156] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655846296] [2022-03-19 02:53:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:37,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:37,568 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:37,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 02:53:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:37,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:37,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:37,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:37,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655846296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:37,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:37,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:38,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:38,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1938037659] [2022-03-19 02:53:38,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1938037659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:38,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:38,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:53:38,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24617488] [2022-03-19 02:53:38,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:38,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:53:38,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:38,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:53:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-03-19 02:53:38,169 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:38,443 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-03-19 02:53:38,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 02:53:38,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 02:53:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:38,444 INFO L225 Difference]: With dead ends: 42 [2022-03-19 02:53:38,444 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 02:53:38,445 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 02:53:38,446 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:38,446 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 33 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:53:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 02:53:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-19 02:53:38,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-19 02:53:38,452 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2022-03-19 02:53:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:38,452 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-19 02:53:38,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-19 02:53:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 02:53:38,453 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:38,453 INFO L500 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:38,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:38,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 02:53:38,676 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1841155664, now seen corresponding path program 9 times [2022-03-19 02:53:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:38,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [404747030] [2022-03-19 02:53:38,706 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:38,749 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:38,749 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:38,750 INFO L85 PathProgramCache]: Analyzing trace with hash -179940433, now seen corresponding path program 1 times [2022-03-19 02:53:38,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:38,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118554044] [2022-03-19 02:53:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:38,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:38,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:38,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:38,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118554044] [2022-03-19 02:53:38,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118554044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:38,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999788141] [2022-03-19 02:53:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:38,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:38,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:38,830 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:38,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 02:53:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:38,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:38,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:38,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:39,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999788141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:39,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:39,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:39,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:39,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [404747030] [2022-03-19 02:53:39,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [404747030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:39,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:39,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 02:53:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576796807] [2022-03-19 02:53:39,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:39,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 02:53:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:39,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 02:53:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-03-19 02:53:39,380 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:39,697 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-03-19 02:53:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 02:53:39,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-19 02:53:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:39,698 INFO L225 Difference]: With dead ends: 44 [2022-03-19 02:53:39,698 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 02:53:39,699 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 02:53:39,699 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:39,699 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 53 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:53:39,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 02:53:39,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 02:53:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-03-19 02:53:39,704 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 33 [2022-03-19 02:53:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:39,704 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-03-19 02:53:39,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-03-19 02:53:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 02:53:39,705 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:39,705 INFO L500 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:39,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:39,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:39,911 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash 412365707, now seen corresponding path program 10 times [2022-03-19 02:53:39,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:39,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1352885929] [2022-03-19 02:53:39,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:39,994 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:39,994 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:39,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1869591727, now seen corresponding path program 1 times [2022-03-19 02:53:39,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:39,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45411872] [2022-03-19 02:53:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:39,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:40,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:40,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:40,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45411872] [2022-03-19 02:53:40,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45411872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:40,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398976933] [2022-03-19 02:53:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:40,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:40,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:40,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:40,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 02:53:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:40,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:40,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:40,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:40,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398976933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:40,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:40,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:40,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:40,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1352885929] [2022-03-19 02:53:40,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1352885929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:40,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:40,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 02:53:40,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484751048] [2022-03-19 02:53:40,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:40,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 02:53:40,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:40,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 02:53:40,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-19 02:53:40,672 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:41,026 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-03-19 02:53:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 02:53:41,026 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 02:53:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:41,027 INFO L225 Difference]: With dead ends: 46 [2022-03-19 02:53:41,027 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 02:53:41,027 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 02:53:41,028 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:41,028 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 73 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:53:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 02:53:41,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-19 02:53:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-03-19 02:53:41,033 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 35 [2022-03-19 02:53:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:41,034 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-03-19 02:53:41,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-03-19 02:53:41,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 02:53:41,034 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:41,034 INFO L500 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:41,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:41,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 02:53:41,251 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:41,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1382886054, now seen corresponding path program 11 times [2022-03-19 02:53:41,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:41,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1911332572] [2022-03-19 02:53:41,275 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:41,312 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:41,313 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:41,313 INFO L85 PathProgramCache]: Analyzing trace with hash -375843409, now seen corresponding path program 1 times [2022-03-19 02:53:41,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:41,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727575090] [2022-03-19 02:53:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:41,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:41,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:41,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:41,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727575090] [2022-03-19 02:53:41,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727575090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:41,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734755173] [2022-03-19 02:53:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:41,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:41,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:41,388 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:41,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 02:53:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:41,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:41,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:41,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734755173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:41,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:41,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-19 02:53:42,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:42,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1911332572] [2022-03-19 02:53:42,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1911332572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:42,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:42,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 02:53:42,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704423676] [2022-03-19 02:53:42,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:42,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 02:53:42,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 02:53:42,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-03-19 02:53:42,015 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:42,372 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-03-19 02:53:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 02:53:42,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 02:53:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:42,373 INFO L225 Difference]: With dead ends: 48 [2022-03-19 02:53:42,373 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 02:53:42,373 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 02:53:42,374 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:42,374 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 48 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:53:42,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 02:53:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-19 02:53:42,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-03-19 02:53:42,380 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 37 [2022-03-19 02:53:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:42,380 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-03-19 02:53:42,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-03-19 02:53:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 02:53:42,381 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:42,381 INFO L500 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:42,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:42,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 02:53:42,595 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:42,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2045036289, now seen corresponding path program 12 times [2022-03-19 02:53:42,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:42,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [773509314] [2022-03-19 02:53:42,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:42,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:42,656 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:42,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1673688751, now seen corresponding path program 1 times [2022-03-19 02:53:42,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:42,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395281214] [2022-03-19 02:53:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:42,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:42,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:42,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:42,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395281214] [2022-03-19 02:53:42,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395281214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:42,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657507939] [2022-03-19 02:53:42,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:42,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:42,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:42,728 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:42,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 02:53:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:42,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:42,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:42,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:43,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657507939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:43,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:43,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:43,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:43,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [773509314] [2022-03-19 02:53:43,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [773509314] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:43,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:43,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 02:53:43,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197086172] [2022-03-19 02:53:43,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:43,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 02:53:43,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:43,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 02:53:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2022-03-19 02:53:43,334 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:43,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:43,772 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-03-19 02:53:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 02:53:43,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-19 02:53:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:43,773 INFO L225 Difference]: With dead ends: 50 [2022-03-19 02:53:43,773 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 02:53:43,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=357, Invalid=1805, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 02:53:43,775 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:43,775 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 88 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:53:43,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 02:53:43,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-19 02:53:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-03-19 02:53:43,780 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 39 [2022-03-19 02:53:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:43,781 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-03-19 02:53:43,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:43,781 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-03-19 02:53:43,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 02:53:43,781 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:43,781 INFO L500 BasicCegarLoop]: trace histogram [15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:43,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:44,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 02:53:44,007 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:44,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1578714980, now seen corresponding path program 13 times [2022-03-19 02:53:44,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:44,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [401451451] [2022-03-19 02:53:44,035 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:44,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:44,078 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:44,078 INFO L85 PathProgramCache]: Analyzing trace with hash -571746385, now seen corresponding path program 1 times [2022-03-19 02:53:44,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:44,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459092942] [2022-03-19 02:53:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:44,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:44,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:44,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:44,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459092942] [2022-03-19 02:53:44,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459092942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:44,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250573280] [2022-03-19 02:53:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:44,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:44,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:44,180 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:44,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 02:53:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:44,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:44,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:44,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:44,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250573280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:44,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:44,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:44,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:44,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [401451451] [2022-03-19 02:53:44,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [401451451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:44,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:44,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 02:53:44,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494421062] [2022-03-19 02:53:44,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:44,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 02:53:44,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:44,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 02:53:44,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 02:53:44,795 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:45,343 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-03-19 02:53:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 02:53:45,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-19 02:53:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:45,344 INFO L225 Difference]: With dead ends: 52 [2022-03-19 02:53:45,344 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 02:53:45,345 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=376, Invalid=1976, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 02:53:45,345 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:45,345 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 93 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:53:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 02:53:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-19 02:53:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-03-19 02:53:45,351 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 41 [2022-03-19 02:53:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:45,351 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-03-19 02:53:45,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-03-19 02:53:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 02:53:45,353 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:45,353 INFO L500 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:45,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:45,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 02:53:45,555 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash -785207433, now seen corresponding path program 14 times [2022-03-19 02:53:45,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:45,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1914289826] [2022-03-19 02:53:45,575 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:45,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:45,641 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:45,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1477785775, now seen corresponding path program 1 times [2022-03-19 02:53:45,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:45,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614817734] [2022-03-19 02:53:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:45,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:45,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:45,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:45,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614817734] [2022-03-19 02:53:45,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614817734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:45,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868970978] [2022-03-19 02:53:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:45,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:45,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:45,743 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:45,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 02:53:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:45,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:45,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:45,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:46,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868970978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:46,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:46,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:46,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:46,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1914289826] [2022-03-19 02:53:46,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1914289826] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:46,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:46,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 02:53:46,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498043254] [2022-03-19 02:53:46,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:46,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 02:53:46,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:46,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 02:53:46,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 02:53:46,394 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:46,861 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-03-19 02:53:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 02:53:46,861 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-19 02:53:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:46,862 INFO L225 Difference]: With dead ends: 54 [2022-03-19 02:53:46,862 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 02:53:46,862 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 02:53:46,863 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:46,863 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 43 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:53:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 02:53:46,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-19 02:53:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-03-19 02:53:46,873 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2022-03-19 02:53:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:46,873 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-03-19 02:53:46,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-03-19 02:53:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 02:53:46,874 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:46,874 INFO L500 BasicCegarLoop]: trace histogram [17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:46,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:47,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:47,085 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1566333842, now seen corresponding path program 15 times [2022-03-19 02:53:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:47,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [225984117] [2022-03-19 02:53:47,123 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:47,156 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:47,157 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:47,157 INFO L85 PathProgramCache]: Analyzing trace with hash -767649361, now seen corresponding path program 1 times [2022-03-19 02:53:47,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:47,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102474058] [2022-03-19 02:53:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:47,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:47,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:47,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:47,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102474058] [2022-03-19 02:53:47,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102474058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:47,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235074906] [2022-03-19 02:53:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:47,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:47,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:47,229 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:47,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 02:53:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:47,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:47,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:47,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:47,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235074906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:47,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:47,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:47,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:47,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [225984117] [2022-03-19 02:53:47,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [225984117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:47,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:47,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 02:53:47,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961146302] [2022-03-19 02:53:47,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:47,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 02:53:47,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 02:53:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 02:53:47,882 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:48,385 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-03-19 02:53:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 02:53:48,386 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-19 02:53:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:48,386 INFO L225 Difference]: With dead ends: 56 [2022-03-19 02:53:48,386 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 02:53:48,387 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=2342, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 02:53:48,387 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:48,387 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:53:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 02:53:48,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-19 02:53:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-03-19 02:53:48,392 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 45 [2022-03-19 02:53:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:48,392 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-03-19 02:53:48,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:48,392 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-03-19 02:53:48,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 02:53:48,392 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:48,392 INFO L500 BasicCegarLoop]: trace histogram [18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:48,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:48,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 02:53:48,596 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2050265875, now seen corresponding path program 16 times [2022-03-19 02:53:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:48,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [351017592] [2022-03-19 02:53:48,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:48,667 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:48,667 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:48,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1281882799, now seen corresponding path program 1 times [2022-03-19 02:53:48,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:48,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451050532] [2022-03-19 02:53:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:48,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:48,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:48,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:48,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451050532] [2022-03-19 02:53:48,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451050532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:48,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828409665] [2022-03-19 02:53:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:48,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:48,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:48,770 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:48,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 02:53:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:48,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:48,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:48,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:49,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828409665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:49,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:49,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:49,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:49,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [351017592] [2022-03-19 02:53:49,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [351017592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:49,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:49,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 02:53:49,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291987075] [2022-03-19 02:53:49,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:49,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 02:53:49,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:49,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 02:53:49,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 02:53:49,436 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:49,968 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-03-19 02:53:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 02:53:49,968 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-19 02:53:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:49,969 INFO L225 Difference]: With dead ends: 58 [2022-03-19 02:53:49,969 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 02:53:49,970 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=433, Invalid=2537, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 02:53:49,970 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:49,970 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 38 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:53:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 02:53:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-19 02:53:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-03-19 02:53:49,978 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 47 [2022-03-19 02:53:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:49,978 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-03-19 02:53:49,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-03-19 02:53:49,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 02:53:49,979 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:49,979 INFO L500 BasicCegarLoop]: trace histogram [19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:49,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:50,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:50,195 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1320915848, now seen corresponding path program 17 times [2022-03-19 02:53:50,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:50,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1111997367] [2022-03-19 02:53:50,213 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:50,259 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:50,259 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:50,259 INFO L85 PathProgramCache]: Analyzing trace with hash -963552337, now seen corresponding path program 1 times [2022-03-19 02:53:50,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:50,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564060370] [2022-03-19 02:53:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:50,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:50,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:50,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:50,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564060370] [2022-03-19 02:53:50,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564060370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:50,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610176259] [2022-03-19 02:53:50,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:50,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:50,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:50,343 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:50,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 02:53:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:50,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:50,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:50,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:50,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610176259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:50,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:50,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:51,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:51,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1111997367] [2022-03-19 02:53:51,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1111997367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:51,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:51,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 02:53:51,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756675947] [2022-03-19 02:53:51,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:51,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 02:53:51,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:51,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 02:53:51,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 02:53:51,059 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:51,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:51,703 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-03-19 02:53:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 02:53:51,704 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-19 02:53:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:51,704 INFO L225 Difference]: With dead ends: 60 [2022-03-19 02:53:51,704 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 02:53:51,706 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=452, Invalid=2740, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 02:53:51,707 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:51,707 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 123 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:53:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 02:53:51,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-19 02:53:51,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-03-19 02:53:51,725 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 49 [2022-03-19 02:53:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:51,725 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-03-19 02:53:51,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:51,725 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-03-19 02:53:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 02:53:51,726 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:51,726 INFO L500 BasicCegarLoop]: trace histogram [20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:51,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:51,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:51,948 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:51,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1673756829, now seen corresponding path program 18 times [2022-03-19 02:53:51,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:51,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [989625972] [2022-03-19 02:53:51,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:52,016 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:52,017 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1085979823, now seen corresponding path program 1 times [2022-03-19 02:53:52,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:52,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465908586] [2022-03-19 02:53:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:52,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:52,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:52,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:52,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465908586] [2022-03-19 02:53:52,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465908586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:52,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18706593] [2022-03-19 02:53:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:52,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:52,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:52,150 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:52,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 02:53:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:52,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:52,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:52,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18706593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:52,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:52,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:52,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:52,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [989625972] [2022-03-19 02:53:52,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [989625972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:52,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:52,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 02:53:52,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638387863] [2022-03-19 02:53:52,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:52,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 02:53:52,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 02:53:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 02:53:52,905 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:53,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:53,590 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-03-19 02:53:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 02:53:53,590 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-19 02:53:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:53,591 INFO L225 Difference]: With dead ends: 62 [2022-03-19 02:53:53,591 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 02:53:53,592 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=471, Invalid=2951, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 02:53:53,593 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:53,593 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:53:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 02:53:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 02:53:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-03-19 02:53:53,599 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 51 [2022-03-19 02:53:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:53,599 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-03-19 02:53:53,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-03-19 02:53:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 02:53:53,600 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:53,600 INFO L500 BasicCegarLoop]: trace histogram [21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:53,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:53,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:53,815 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:53,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:53,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1926111106, now seen corresponding path program 19 times [2022-03-19 02:53:53,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:53,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2123877636] [2022-03-19 02:53:53,833 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:53,873 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:53,873 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1159455313, now seen corresponding path program 1 times [2022-03-19 02:53:53,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:53,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217843349] [2022-03-19 02:53:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:53,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:53,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:53,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:53,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217843349] [2022-03-19 02:53:53,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217843349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:53,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403741946] [2022-03-19 02:53:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:53,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:53,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:53,952 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:53,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 02:53:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:53,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:53,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:54,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:54,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403741946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:54,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:54,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:54,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:54,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2123877636] [2022-03-19 02:53:54,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2123877636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:54,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:54,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 02:53:54,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976851440] [2022-03-19 02:53:54,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:54,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 02:53:54,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:54,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 02:53:54,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 02:53:54,767 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:55,452 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2022-03-19 02:53:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 02:53:55,454 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-19 02:53:55,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:55,455 INFO L225 Difference]: With dead ends: 64 [2022-03-19 02:53:55,455 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 02:53:55,456 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=490, Invalid=3170, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 02:53:55,456 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:55,456 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 78 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:53:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 02:53:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-19 02:53:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-03-19 02:53:55,472 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 53 [2022-03-19 02:53:55,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:55,472 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-03-19 02:53:55,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:55,472 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-03-19 02:53:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 02:53:55,473 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:55,473 INFO L500 BasicCegarLoop]: trace histogram [22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:55,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-19 02:53:55,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:55,687 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:55,688 INFO L85 PathProgramCache]: Analyzing trace with hash 374564569, now seen corresponding path program 20 times [2022-03-19 02:53:55,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:55,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027361212] [2022-03-19 02:53:55,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:55,763 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:55,763 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash 890076847, now seen corresponding path program 1 times [2022-03-19 02:53:55,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:55,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099590174] [2022-03-19 02:53:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:55,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:55,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:55,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:55,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099590174] [2022-03-19 02:53:55,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099590174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:55,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111918739] [2022-03-19 02:53:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:55,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:55,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:55,833 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:55,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 02:53:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:55,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:55,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:56,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111918739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:56,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:56,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:56,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:56,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1027361212] [2022-03-19 02:53:56,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1027361212] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:56,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:56,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-19 02:53:56,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105948221] [2022-03-19 02:53:56,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:56,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 02:53:56,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 02:53:56,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 02:53:56,607 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:57,419 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2022-03-19 02:53:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 02:53:57,419 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-19 02:53:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:57,420 INFO L225 Difference]: With dead ends: 66 [2022-03-19 02:53:57,420 INFO L226 Difference]: Without dead ends: 59 [2022-03-19 02:53:57,420 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 02:53:57,421 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:57,421 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 108 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 02:53:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-19 02:53:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-19 02:53:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-03-19 02:53:57,427 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 55 [2022-03-19 02:53:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:57,427 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-03-19 02:53:57,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-03-19 02:53:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 02:53:57,428 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:57,428 INFO L500 BasicCegarLoop]: trace histogram [23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:57,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 02:53:57,631 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,SelfDestructingSolverStorable22 [2022-03-19 02:53:57,631 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:57,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:57,632 INFO L85 PathProgramCache]: Analyzing trace with hash -584269196, now seen corresponding path program 21 times [2022-03-19 02:53:57,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:57,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [817399497] [2022-03-19 02:53:57,650 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:57,699 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:57,700 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:57,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1355358289, now seen corresponding path program 1 times [2022-03-19 02:53:57,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:57,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283855219] [2022-03-19 02:53:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:57,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:57,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:57,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283855219] [2022-03-19 02:53:57,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283855219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400906477] [2022-03-19 02:53:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:57,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:57,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:57,761 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:57,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 02:53:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:57,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:57,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:57,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:53:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:58,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400906477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:53:58,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:53:58,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:53:58,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:53:58,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [817399497] [2022-03-19 02:53:58,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [817399497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:53:58,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:53:58,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-19 02:53:58,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694922306] [2022-03-19 02:53:58,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:53:58,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 02:53:58,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:58,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 02:53:58,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 02:53:58,576 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:53:59,409 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-03-19 02:53:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 02:53:59,409 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-19 02:53:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:53:59,409 INFO L225 Difference]: With dead ends: 68 [2022-03-19 02:53:59,409 INFO L226 Difference]: Without dead ends: 61 [2022-03-19 02:53:59,410 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=528, Invalid=3632, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 02:53:59,411 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:53:59,411 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 58 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 02:53:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-19 02:53:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-19 02:53:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-03-19 02:53:59,415 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 57 [2022-03-19 02:53:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:53:59,415 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-03-19 02:53:59,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:53:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-03-19 02:53:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 02:53:59,416 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:53:59,416 INFO L500 BasicCegarLoop]: trace histogram [24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:53:59,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 02:53:59,617 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,SelfDestructingSolverStorable23 [2022-03-19 02:53:59,618 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:53:59,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:53:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1394451279, now seen corresponding path program 22 times [2022-03-19 02:53:59,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:53:59,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193716790] [2022-03-19 02:53:59,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:59,675 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:53:59,675 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:53:59,675 INFO L85 PathProgramCache]: Analyzing trace with hash 694173871, now seen corresponding path program 1 times [2022-03-19 02:53:59,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:53:59,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934149569] [2022-03-19 02:53:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:59,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:53:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:59,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:53:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:53:59,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934149569] [2022-03-19 02:53:59,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934149569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:53:59,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857042313] [2022-03-19 02:53:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:53:59,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:53:59,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:53:59,760 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:53:59,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 02:53:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:53:59,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:53:59,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:53:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:53:59,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:00,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857042313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:00,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:00,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:00,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:00,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193716790] [2022-03-19 02:54:00,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193716790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:00,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:00,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-19 02:54:00,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231308694] [2022-03-19 02:54:00,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:00,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 02:54:00,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 02:54:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 02:54:00,619 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:01,533 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2022-03-19 02:54:01,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 02:54:01,534 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-19 02:54:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:01,534 INFO L225 Difference]: With dead ends: 70 [2022-03-19 02:54:01,534 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 02:54:01,535 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=547, Invalid=3875, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 02:54:01,535 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:01,536 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 108 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 02:54:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 02:54:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-19 02:54:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-03-19 02:54:01,541 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 59 [2022-03-19 02:54:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:01,541 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-03-19 02:54:01,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-03-19 02:54:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 02:54:01,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:01,542 INFO L500 BasicCegarLoop]: trace histogram [25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:01,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-19 02:54:01,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:01,747 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:01,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:01,748 INFO L85 PathProgramCache]: Analyzing trace with hash 274315626, now seen corresponding path program 23 times [2022-03-19 02:54:01,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:01,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [168095568] [2022-03-19 02:54:01,772 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:01,806 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:01,806 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:01,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1551261265, now seen corresponding path program 1 times [2022-03-19 02:54:01,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:01,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385510380] [2022-03-19 02:54:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:01,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:01,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:01,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:01,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385510380] [2022-03-19 02:54:01,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385510380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:01,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342167707] [2022-03-19 02:54:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:01,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:01,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:01,873 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:01,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 02:54:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:01,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:01,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:02,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:02,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342167707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:02,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:02,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:02,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:02,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [168095568] [2022-03-19 02:54:02,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [168095568] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:02,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:02,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 02:54:02,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765429640] [2022-03-19 02:54:02,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:02,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 02:54:02,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:02,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 02:54:02,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 02:54:02,874 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:03,943 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2022-03-19 02:54:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 02:54:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-19 02:54:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:03,944 INFO L225 Difference]: With dead ends: 72 [2022-03-19 02:54:03,944 INFO L226 Difference]: Without dead ends: 65 [2022-03-19 02:54:03,945 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=566, Invalid=4126, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 02:54:03,945 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:03,945 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 148 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:54:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-19 02:54:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-19 02:54:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-03-19 02:54:03,952 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 61 [2022-03-19 02:54:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:03,952 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-03-19 02:54:03,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-03-19 02:54:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 02:54:03,953 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:03,953 INFO L500 BasicCegarLoop]: trace histogram [26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:03,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 02:54:04,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:04,167 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:04,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1860744389, now seen corresponding path program 24 times [2022-03-19 02:54:04,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:04,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1429642395] [2022-03-19 02:54:04,186 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:04,222 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:04,222 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:04,223 INFO L85 PathProgramCache]: Analyzing trace with hash 498270895, now seen corresponding path program 1 times [2022-03-19 02:54:04,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:04,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452997284] [2022-03-19 02:54:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:04,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:04,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:04,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452997284] [2022-03-19 02:54:04,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452997284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583031419] [2022-03-19 02:54:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:04,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:04,299 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:04,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 02:54:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:04,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:04,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:04,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:04,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583031419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:04,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:04,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:05,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:05,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1429642395] [2022-03-19 02:54:05,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1429642395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:05,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:05,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-19 02:54:05,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51676448] [2022-03-19 02:54:05,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:05,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 02:54:05,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 02:54:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 02:54:05,157 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:06,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:06,147 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-03-19 02:54:06,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 02:54:06,147 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-19 02:54:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:06,148 INFO L225 Difference]: With dead ends: 74 [2022-03-19 02:54:06,148 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 02:54:06,149 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=585, Invalid=4385, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 02:54:06,154 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:06,154 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 53 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 02:54:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 02:54:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-19 02:54:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-03-19 02:54:06,161 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 63 [2022-03-19 02:54:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:06,162 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-03-19 02:54:06,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-03-19 02:54:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 02:54:06,162 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:06,163 INFO L500 BasicCegarLoop]: trace histogram [27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:06,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-19 02:54:06,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 02:54:06,367 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1705395552, now seen corresponding path program 25 times [2022-03-19 02:54:06,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:06,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [639783657] [2022-03-19 02:54:06,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:06,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:06,438 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:06,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1747164241, now seen corresponding path program 1 times [2022-03-19 02:54:06,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:06,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281805094] [2022-03-19 02:54:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:06,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:06,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:06,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:06,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281805094] [2022-03-19 02:54:06,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281805094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:06,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210583847] [2022-03-19 02:54:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:06,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:06,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:06,517 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:06,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 02:54:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:06,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:06,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210583847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:06,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:06,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:07,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:07,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [639783657] [2022-03-19 02:54:07,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [639783657] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:07,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:07,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-19 02:54:07,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048291596] [2022-03-19 02:54:07,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:07,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 02:54:07,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:07,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 02:54:07,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 02:54:07,424 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 33 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:08,480 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-03-19 02:54:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 02:54:08,481 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-19 02:54:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:08,481 INFO L225 Difference]: With dead ends: 76 [2022-03-19 02:54:08,481 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 02:54:08,482 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=604, Invalid=4652, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 02:54:08,482 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:08,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 133 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 02:54:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 02:54:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-19 02:54:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-03-19 02:54:08,487 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 65 [2022-03-19 02:54:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:08,487 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-03-19 02:54:08,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-03-19 02:54:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 02:54:08,488 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:08,488 INFO L500 BasicCegarLoop]: trace histogram [28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:08,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-19 02:54:08,688 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,SelfDestructingSolverStorable27 [2022-03-19 02:54:08,688 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:08,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1555948741, now seen corresponding path program 26 times [2022-03-19 02:54:08,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:08,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843501999] [2022-03-19 02:54:08,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:08,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:08,753 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash 302367919, now seen corresponding path program 1 times [2022-03-19 02:54:08,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:08,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138571974] [2022-03-19 02:54:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:08,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:08,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:08,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:08,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138571974] [2022-03-19 02:54:08,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138571974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:08,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970190212] [2022-03-19 02:54:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:08,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:08,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:08,819 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:08,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 02:54:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:08,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:08,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:08,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:09,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970190212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:09,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:09,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:09,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843501999] [2022-03-19 02:54:09,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843501999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:09,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:09,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-19 02:54:09,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271642540] [2022-03-19 02:54:09,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:09,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 02:54:09,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:09,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 02:54:09,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1764, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 02:54:09,750 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:10,885 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2022-03-19 02:54:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 02:54:10,886 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-19 02:54:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:10,886 INFO L225 Difference]: With dead ends: 78 [2022-03-19 02:54:10,886 INFO L226 Difference]: Without dead ends: 71 [2022-03-19 02:54:10,887 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=623, Invalid=4927, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 02:54:10,888 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:10,888 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 138 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:54:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-19 02:54:10,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-19 02:54:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-03-19 02:54:10,893 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 67 [2022-03-19 02:54:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:10,893 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-03-19 02:54:10,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-03-19 02:54:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 02:54:10,894 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:10,894 INFO L500 BasicCegarLoop]: trace histogram [29, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:10,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 02:54:11,099 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,SelfDestructingSolverStorable28 [2022-03-19 02:54:11,099 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash -381688234, now seen corresponding path program 27 times [2022-03-19 02:54:11,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:11,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [5446183] [2022-03-19 02:54:11,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:11,189 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:11,189 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1943067217, now seen corresponding path program 1 times [2022-03-19 02:54:11,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:11,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790987646] [2022-03-19 02:54:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:11,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:11,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:11,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:11,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790987646] [2022-03-19 02:54:11,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790987646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:11,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23704254] [2022-03-19 02:54:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:11,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:11,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:11,288 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:11,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 02:54:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:11,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:11,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:11,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23704254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:11,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:11,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:12,340 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:12,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [5446183] [2022-03-19 02:54:12,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [5446183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:12,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:12,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-19 02:54:12,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156021372] [2022-03-19 02:54:12,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:12,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 02:54:12,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 02:54:12,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1848, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 02:54:12,342 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:13,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:13,484 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-03-19 02:54:13,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 02:54:13,484 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-19 02:54:13,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:13,485 INFO L225 Difference]: With dead ends: 80 [2022-03-19 02:54:13,485 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 02:54:13,486 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=642, Invalid=5210, Unknown=0, NotChecked=0, Total=5852 [2022-03-19 02:54:13,486 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:13,486 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 48 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:54:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 02:54:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-19 02:54:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-03-19 02:54:13,492 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 69 [2022-03-19 02:54:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:13,492 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-03-19 02:54:13,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-03-19 02:54:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 02:54:13,493 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:13,493 INFO L500 BasicCegarLoop]: trace histogram [30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:13,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-19 02:54:13,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:13,707 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:13,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1493739855, now seen corresponding path program 28 times [2022-03-19 02:54:13,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:13,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1372084157] [2022-03-19 02:54:13,726 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:13,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:13,759 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash 106464943, now seen corresponding path program 1 times [2022-03-19 02:54:13,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:13,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985850459] [2022-03-19 02:54:13,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:13,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:13,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:13,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:13,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985850459] [2022-03-19 02:54:13,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985850459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:13,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662713317] [2022-03-19 02:54:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:13,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:13,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:13,829 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:13,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 02:54:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:13,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:13,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:13,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:14,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662713317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:14,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:14,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:14,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:14,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1372084157] [2022-03-19 02:54:14,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1372084157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:14,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:14,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-19 02:54:14,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959416131] [2022-03-19 02:54:14,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:14,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 02:54:14,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 02:54:14,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1934, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 02:54:14,902 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:16,079 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2022-03-19 02:54:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 02:54:16,079 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-19 02:54:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:16,080 INFO L225 Difference]: With dead ends: 82 [2022-03-19 02:54:16,080 INFO L226 Difference]: Without dead ends: 75 [2022-03-19 02:54:16,081 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=661, Invalid=5501, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 02:54:16,081 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:16,082 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 33 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:54:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-19 02:54:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-19 02:54:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-03-19 02:54:16,089 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 71 [2022-03-19 02:54:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:16,089 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-03-19 02:54:16,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-03-19 02:54:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 02:54:16,090 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:16,090 INFO L500 BasicCegarLoop]: trace histogram [31, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:16,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-19 02:54:16,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:16,295 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash -728490932, now seen corresponding path program 29 times [2022-03-19 02:54:16,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:16,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1930280488] [2022-03-19 02:54:16,315 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:16,350 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:16,350 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:16,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2138970193, now seen corresponding path program 1 times [2022-03-19 02:54:16,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:16,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297387378] [2022-03-19 02:54:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:16,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:16,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:16,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:16,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297387378] [2022-03-19 02:54:16,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297387378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:16,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510301341] [2022-03-19 02:54:16,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:16,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:16,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:16,431 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:16,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 02:54:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:16,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:16,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510301341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:16,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:16,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:17,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:17,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1930280488] [2022-03-19 02:54:17,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1930280488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:17,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:17,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-19 02:54:17,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616225252] [2022-03-19 02:54:17,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:17,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 02:54:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 02:54:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2022, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 02:54:17,526 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:18,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:18,901 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-03-19 02:54:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 02:54:18,901 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-03-19 02:54:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:18,902 INFO L225 Difference]: With dead ends: 84 [2022-03-19 02:54:18,902 INFO L226 Difference]: Without dead ends: 77 [2022-03-19 02:54:18,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=680, Invalid=5800, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 02:54:18,903 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:18,903 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 98 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 02:54:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-19 02:54:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-19 02:54:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-03-19 02:54:18,911 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 73 [2022-03-19 02:54:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:18,911 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-03-19 02:54:18,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-03-19 02:54:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 02:54:18,912 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:18,912 INFO L500 BasicCegarLoop]: trace histogram [32, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:18,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-19 02:54:19,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:19,123 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:19,124 INFO L85 PathProgramCache]: Analyzing trace with hash 236316455, now seen corresponding path program 30 times [2022-03-19 02:54:19,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:19,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1811486211] [2022-03-19 02:54:19,150 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:19,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:19,199 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash -89438033, now seen corresponding path program 1 times [2022-03-19 02:54:19,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:19,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756436994] [2022-03-19 02:54:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:19,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:19,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:19,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:19,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756436994] [2022-03-19 02:54:19,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756436994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:19,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043043655] [2022-03-19 02:54:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:19,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:19,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:19,266 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:19,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 02:54:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:19,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:19,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:19,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:19,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043043655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:19,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:19,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:20,329 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1811486211] [2022-03-19 02:54:20,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1811486211] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:20,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:20,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-19 02:54:20,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597562962] [2022-03-19 02:54:20,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:20,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-19 02:54:20,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:20,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-19 02:54:20,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2112, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 02:54:20,330 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:21,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:21,756 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-03-19 02:54:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 02:54:21,757 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-19 02:54:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:21,757 INFO L225 Difference]: With dead ends: 86 [2022-03-19 02:54:21,757 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 02:54:21,759 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=699, Invalid=6107, Unknown=0, NotChecked=0, Total=6806 [2022-03-19 02:54:21,759 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:21,759 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 158 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 02:54:21,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 02:54:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-19 02:54:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-03-19 02:54:21,771 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 75 [2022-03-19 02:54:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:21,772 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-03-19 02:54:21,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-03-19 02:54:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 02:54:21,772 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:21,772 INFO L500 BasicCegarLoop]: trace histogram [33, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:21,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-19 02:54:21,973 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,SelfDestructingSolverStorable32 [2022-03-19 02:54:21,973 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:21,973 INFO L85 PathProgramCache]: Analyzing trace with hash -296720574, now seen corresponding path program 31 times [2022-03-19 02:54:21,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:21,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [522456273] [2022-03-19 02:54:22,007 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:22,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:22,052 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1960094127, now seen corresponding path program 1 times [2022-03-19 02:54:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:22,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912541909] [2022-03-19 02:54:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:22,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:22,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:22,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912541909] [2022-03-19 02:54:22,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912541909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:22,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290532698] [2022-03-19 02:54:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:22,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:22,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:22,124 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:22,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 02:54:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:22,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:22,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:22,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290532698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:22,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:22,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:23,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:23,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [522456273] [2022-03-19 02:54:23,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [522456273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:23,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:23,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-19 02:54:23,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726704076] [2022-03-19 02:54:23,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:23,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-19 02:54:23,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:23,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-19 02:54:23,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2204, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 02:54:23,290 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:24,771 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2022-03-19 02:54:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-19 02:54:24,772 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-19 02:54:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:24,772 INFO L225 Difference]: With dead ends: 88 [2022-03-19 02:54:24,772 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 02:54:24,773 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=718, Invalid=6422, Unknown=0, NotChecked=0, Total=7140 [2022-03-19 02:54:24,774 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:24,774 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 88 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2312 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 02:54:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 02:54:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-19 02:54:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-03-19 02:54:24,779 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 77 [2022-03-19 02:54:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:24,779 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-03-19 02:54:24,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-03-19 02:54:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 02:54:24,779 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:24,780 INFO L500 BasicCegarLoop]: trace histogram [34, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:24,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-19 02:54:24,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:24,980 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:24,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:24,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1444197219, now seen corresponding path program 32 times [2022-03-19 02:54:24,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:24,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1849065958] [2022-03-19 02:54:25,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:25,050 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:25,051 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:25,051 INFO L85 PathProgramCache]: Analyzing trace with hash -285341009, now seen corresponding path program 1 times [2022-03-19 02:54:25,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:25,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359164740] [2022-03-19 02:54:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:25,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:25,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:25,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:25,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359164740] [2022-03-19 02:54:25,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359164740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:25,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817619373] [2022-03-19 02:54:25,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:25,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:25,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:25,123 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:25,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 02:54:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:25,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:25,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:25,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:25,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817619373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:25,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:25,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:26,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:26,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1849065958] [2022-03-19 02:54:26,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1849065958] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:26,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:26,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-19 02:54:26,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438378039] [2022-03-19 02:54:26,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:26,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-19 02:54:26,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:26,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-19 02:54:26,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2298, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 02:54:26,257 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:27,818 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-03-19 02:54:27,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 02:54:27,818 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-19 02:54:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:27,818 INFO L225 Difference]: With dead ends: 90 [2022-03-19 02:54:27,818 INFO L226 Difference]: Without dead ends: 83 [2022-03-19 02:54:27,819 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=737, Invalid=6745, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 02:54:27,820 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2626 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:27,820 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 143 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2626 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 02:54:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-19 02:54:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-19 02:54:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-03-19 02:54:27,828 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 79 [2022-03-19 02:54:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:27,828 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-03-19 02:54:27,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-03-19 02:54:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 02:54:27,829 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:27,829 INFO L500 BasicCegarLoop]: trace histogram [35, 33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:27,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 02:54:28,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:28,035 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:28,036 INFO L85 PathProgramCache]: Analyzing trace with hash -362657992, now seen corresponding path program 33 times [2022-03-19 02:54:28,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:28,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1061767797] [2022-03-19 02:54:28,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:28,105 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:28,106 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:28,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1764191151, now seen corresponding path program 1 times [2022-03-19 02:54:28,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:28,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536105143] [2022-03-19 02:54:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:28,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:28,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:28,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536105143] [2022-03-19 02:54:28,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536105143] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254067149] [2022-03-19 02:54:28,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:28,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:28,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:28,188 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:28,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 02:54:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:28,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:28,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:28,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:28,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254067149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:28,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:28,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-19 02:54:29,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:29,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1061767797] [2022-03-19 02:54:29,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1061767797] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:29,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:29,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-19 02:54:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522255431] [2022-03-19 02:54:29,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:29,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-19 02:54:29,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:29,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-19 02:54:29,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2337, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 02:54:29,449 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:31,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:31,099 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2022-03-19 02:54:31,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 02:54:31,100 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-19 02:54:31,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:31,101 INFO L225 Difference]: With dead ends: 92 [2022-03-19 02:54:31,101 INFO L226 Difference]: Without dead ends: 85 [2022-03-19 02:54:31,101 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=673, Invalid=6983, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 02:54:31,102 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2721 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:31,102 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 123 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2721 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 02:54:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-19 02:54:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-19 02:54:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-03-19 02:54:31,113 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 81 [2022-03-19 02:54:31,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:31,114 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-03-19 02:54:31,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-03-19 02:54:31,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 02:54:31,114 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:31,114 INFO L500 BasicCegarLoop]: trace histogram [36, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:31,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 02:54:31,323 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,SelfDestructingSolverStorable35 [2022-03-19 02:54:31,323 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash -385546477, now seen corresponding path program 34 times [2022-03-19 02:54:31,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:31,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1535313208] [2022-03-19 02:54:31,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:31,377 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:31,377 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:31,378 INFO L85 PathProgramCache]: Analyzing trace with hash -481243985, now seen corresponding path program 1 times [2022-03-19 02:54:31,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:31,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095079586] [2022-03-19 02:54:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:31,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:31,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:31,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:31,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095079586] [2022-03-19 02:54:31,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095079586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:31,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333728854] [2022-03-19 02:54:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:31,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:31,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:31,452 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:31,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 02:54:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:31,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:31,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:31,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333728854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:31,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:31,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:32,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:32,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1535313208] [2022-03-19 02:54:32,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1535313208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:32,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:32,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-19 02:54:32,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700250978] [2022-03-19 02:54:32,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:32,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 02:54:32,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:32,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 02:54:32,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=2492, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 02:54:32,701 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:34,472 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-03-19 02:54:34,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 02:54:34,472 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-19 02:54:34,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:34,473 INFO L225 Difference]: With dead ends: 94 [2022-03-19 02:54:34,473 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 02:54:34,474 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=775, Invalid=7415, Unknown=0, NotChecked=0, Total=8190 [2022-03-19 02:54:34,474 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:34,474 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 198 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 02:54:34,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 02:54:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-19 02:54:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-03-19 02:54:34,482 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 83 [2022-03-19 02:54:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:34,483 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-03-19 02:54:34,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-03-19 02:54:34,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 02:54:34,483 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:34,483 INFO L500 BasicCegarLoop]: trace histogram [37, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:34,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-19 02:54:34,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-19 02:54:34,684 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:34,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:34,684 INFO L85 PathProgramCache]: Analyzing trace with hash -906544082, now seen corresponding path program 35 times [2022-03-19 02:54:34,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:34,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [881779323] [2022-03-19 02:54:34,702 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:34,742 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:34,742 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:34,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1568288175, now seen corresponding path program 1 times [2022-03-19 02:54:34,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:34,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800219514] [2022-03-19 02:54:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:34,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:34,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:34,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:34,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800219514] [2022-03-19 02:54:34,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800219514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:34,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307681615] [2022-03-19 02:54:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:34,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:34,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:34,813 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:34,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 02:54:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:34,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:34,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:34,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:35,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307681615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:35,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:35,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:36,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:36,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [881779323] [2022-03-19 02:54:36,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [881779323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:36,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:36,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-19 02:54:36,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787701749] [2022-03-19 02:54:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:36,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 02:54:36,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 02:54:36,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2592, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 02:54:36,052 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:37,860 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-03-19 02:54:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 02:54:37,860 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-19 02:54:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:37,861 INFO L225 Difference]: With dead ends: 96 [2022-03-19 02:54:37,861 INFO L226 Difference]: Without dead ends: 89 [2022-03-19 02:54:37,862 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=794, Invalid=7762, Unknown=0, NotChecked=0, Total=8556 [2022-03-19 02:54:37,862 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3033 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 3112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:37,862 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 133 Invalid, 3112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3033 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 02:54:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-19 02:54:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-19 02:54:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:37,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-03-19 02:54:37,870 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 85 [2022-03-19 02:54:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:37,871 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-03-19 02:54:37,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:37,871 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-03-19 02:54:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 02:54:37,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:37,871 INFO L500 BasicCegarLoop]: trace histogram [38, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:37,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-19 02:54:38,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 02:54:38,072 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:38,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:38,072 INFO L85 PathProgramCache]: Analyzing trace with hash 925931145, now seen corresponding path program 36 times [2022-03-19 02:54:38,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:38,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2099355065] [2022-03-19 02:54:38,095 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:38,130 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:38,130 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash -677146961, now seen corresponding path program 1 times [2022-03-19 02:54:38,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:38,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803841381] [2022-03-19 02:54:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:38,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:38,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:38,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:38,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803841381] [2022-03-19 02:54:38,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803841381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:38,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768028293] [2022-03-19 02:54:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:38,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:38,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:38,208 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:38,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 02:54:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:38,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:38,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:38,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:38,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768028293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:38,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:38,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:39,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:39,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2099355065] [2022-03-19 02:54:39,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2099355065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:39,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:39,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-19 02:54:39,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493145642] [2022-03-19 02:54:39,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:39,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 02:54:39,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:39,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 02:54:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2694, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 02:54:39,523 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 42 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:41,454 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-03-19 02:54:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 02:54:41,455 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 42 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-19 02:54:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:41,455 INFO L225 Difference]: With dead ends: 98 [2022-03-19 02:54:41,455 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 02:54:41,456 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1867 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=813, Invalid=8117, Unknown=0, NotChecked=0, Total=8930 [2022-03-19 02:54:41,456 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3250 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:41,456 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 163 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3250 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 02:54:41,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 02:54:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-19 02:54:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-03-19 02:54:41,462 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 87 [2022-03-19 02:54:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:41,463 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-03-19 02:54:41,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 42 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:41,463 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-03-19 02:54:41,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 02:54:41,463 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:41,463 INFO L500 BasicCegarLoop]: trace histogram [39, 37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:41,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-19 02:54:41,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 02:54:41,664 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash 998032932, now seen corresponding path program 37 times [2022-03-19 02:54:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:41,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1097650029] [2022-03-19 02:54:41,682 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:41,715 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:41,715 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:41,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1372385199, now seen corresponding path program 1 times [2022-03-19 02:54:41,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:41,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719919558] [2022-03-19 02:54:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:41,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:41,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:41,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719919558] [2022-03-19 02:54:41,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719919558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032174689] [2022-03-19 02:54:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:41,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:41,795 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:41,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 02:54:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:41,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:41,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:42,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032174689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:42,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:42,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:43,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:43,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1097650029] [2022-03-19 02:54:43,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1097650029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:43,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:43,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-19 02:54:43,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752712235] [2022-03-19 02:54:43,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:43,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-19 02:54:43,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:43,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-19 02:54:43,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2798, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 02:54:43,127 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:45,036 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2022-03-19 02:54:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 02:54:45,036 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-19 02:54:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:45,037 INFO L225 Difference]: With dead ends: 100 [2022-03-19 02:54:45,037 INFO L226 Difference]: Without dead ends: 93 [2022-03-19 02:54:45,038 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=832, Invalid=8480, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 02:54:45,038 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:45,038 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 43 Invalid, 3224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3141 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 02:54:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-19 02:54:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-19 02:54:45,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-03-19 02:54:45,045 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 89 [2022-03-19 02:54:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:45,045 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-03-19 02:54:45,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-03-19 02:54:45,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 02:54:45,046 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:45,046 INFO L500 BasicCegarLoop]: trace histogram [40, 38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:45,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-19 02:54:45,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 02:54:45,252 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1568373503, now seen corresponding path program 38 times [2022-03-19 02:54:45,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:45,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [153820345] [2022-03-19 02:54:45,271 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:45,303 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:45,303 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash -873049937, now seen corresponding path program 1 times [2022-03-19 02:54:45,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:45,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873325854] [2022-03-19 02:54:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:45,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:45,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:45,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:45,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873325854] [2022-03-19 02:54:45,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873325854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:45,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468116439] [2022-03-19 02:54:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:45,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:45,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:45,378 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:45,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 02:54:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:45,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:45,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:45,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:45,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468116439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:45,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:45,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:46,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:46,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [153820345] [2022-03-19 02:54:46,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [153820345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:46,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:46,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-19 02:54:46,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040884580] [2022-03-19 02:54:46,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:46,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-19 02:54:46,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:46,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-19 02:54:46,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2904, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 02:54:46,723 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:48,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:48,809 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2022-03-19 02:54:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 02:54:48,809 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-03-19 02:54:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:48,810 INFO L225 Difference]: With dead ends: 102 [2022-03-19 02:54:48,810 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 02:54:48,811 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=851, Invalid=8851, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 02:54:48,811 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3580 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 3665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:48,811 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 203 Invalid, 3665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3580 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 02:54:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 02:54:48,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-19 02:54:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-03-19 02:54:48,820 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 91 [2022-03-19 02:54:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:48,820 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-03-19 02:54:48,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-03-19 02:54:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 02:54:48,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:48,821 INFO L500 BasicCegarLoop]: trace histogram [41, 39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:48,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 02:54:49,034 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,SelfDestructingSolverStorable40 [2022-03-19 02:54:49,034 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:49,035 INFO L85 PathProgramCache]: Analyzing trace with hash -90151654, now seen corresponding path program 39 times [2022-03-19 02:54:49,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:49,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [6883353] [2022-03-19 02:54:49,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:49,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:49,102 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1176482223, now seen corresponding path program 1 times [2022-03-19 02:54:49,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:49,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073615097] [2022-03-19 02:54:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:49,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:49,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:49,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:49,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073615097] [2022-03-19 02:54:49,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073615097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:49,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603103135] [2022-03-19 02:54:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:49,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:49,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:49,181 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:49,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 02:54:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:49,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:49,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:49,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:49,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603103135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:49,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:49,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:50,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:50,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [6883353] [2022-03-19 02:54:50,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [6883353] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:50,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:50,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-19 02:54:50,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850939769] [2022-03-19 02:54:50,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:50,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 02:54:50,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:50,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 02:54:50,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3012, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 02:54:50,598 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:52,699 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2022-03-19 02:54:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 02:54:52,700 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-19 02:54:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:52,700 INFO L225 Difference]: With dead ends: 104 [2022-03-19 02:54:52,700 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 02:54:52,701 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=870, Invalid=9230, Unknown=0, NotChecked=0, Total=10100 [2022-03-19 02:54:52,702 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3543 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 3630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:52,702 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 113 Invalid, 3630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3543 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 02:54:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 02:54:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-19 02:54:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-03-19 02:54:52,709 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 93 [2022-03-19 02:54:52,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:52,709 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-03-19 02:54:52,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-03-19 02:54:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 02:54:52,710 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:52,710 INFO L500 BasicCegarLoop]: trace histogram [42, 40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:52,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-19 02:54:52,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-19 02:54:52,918 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:52,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:52,918 INFO L85 PathProgramCache]: Analyzing trace with hash -499960715, now seen corresponding path program 40 times [2022-03-19 02:54:52,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:52,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282779623] [2022-03-19 02:54:52,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:52,970 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:52,971 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:52,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1068952913, now seen corresponding path program 1 times [2022-03-19 02:54:52,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:52,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472994170] [2022-03-19 02:54:52,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:52,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:53,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:53,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:53,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472994170] [2022-03-19 02:54:53,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472994170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:53,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171125581] [2022-03-19 02:54:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:53,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:53,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:53,037 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:53,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 02:54:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:53,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:53,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:53,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:53,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171125581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:53,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:53,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:54,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:54,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282779623] [2022-03-19 02:54:54,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282779623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:54,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:54,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-19 02:54:54,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662046607] [2022-03-19 02:54:54,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:54,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-19 02:54:54,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-19 02:54:54,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=3122, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 02:54:54,503 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:54:56,681 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2022-03-19 02:54:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 02:54:56,682 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-19 02:54:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:54:56,682 INFO L225 Difference]: With dead ends: 106 [2022-03-19 02:54:56,682 INFO L226 Difference]: Without dead ends: 99 [2022-03-19 02:54:56,683 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=889, Invalid=9617, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 02:54:56,684 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3630 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:54:56,684 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 43 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3630 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 02:54:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-19 02:54:56,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-19 02:54:56,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:56,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-03-19 02:54:56,696 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 95 [2022-03-19 02:54:56,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:54:56,697 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-03-19 02:54:56,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:54:56,697 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-03-19 02:54:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 02:54:56,697 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:54:56,697 INFO L500 BasicCegarLoop]: trace histogram [43, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:54:56,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-19 02:54:56,899 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,SelfDestructingSolverStorable42 [2022-03-19 02:54:56,899 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:54:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:54:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash 810522896, now seen corresponding path program 41 times [2022-03-19 02:54:56,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:56,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846087771] [2022-03-19 02:54:56,924 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:56,958 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:54:56,958 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:54:56,958 INFO L85 PathProgramCache]: Analyzing trace with hash 980579247, now seen corresponding path program 1 times [2022-03-19 02:54:56,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:54:56,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676584407] [2022-03-19 02:54:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:56,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:54:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:57,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:54:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:57,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:54:57,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676584407] [2022-03-19 02:54:57,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676584407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:54:57,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090396107] [2022-03-19 02:54:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:54:57,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:54:57,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:54:57,023 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:54:57,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 02:54:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:54:57,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:54:57,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:54:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:57,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:54:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:54:57,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090396107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:54:57,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:54:57,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:54:58,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:54:58,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846087771] [2022-03-19 02:54:58,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846087771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:54:58,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:54:58,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-19 02:54:58,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492859324] [2022-03-19 02:54:58,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:54:58,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-19 02:54:58,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:54:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-19 02:54:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=3234, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 02:54:58,518 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 49 states, 48 states have (on average 1.9375) internal successors, (93), 47 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:00,832 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2022-03-19 02:55:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 02:55:00,832 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.9375) internal successors, (93), 47 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-03-19 02:55:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:00,833 INFO L225 Difference]: With dead ends: 108 [2022-03-19 02:55:00,833 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 02:55:00,834 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2207 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=908, Invalid=10012, Unknown=0, NotChecked=0, Total=10920 [2022-03-19 02:55:00,834 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3987 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 4078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:00,834 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 163 Invalid, 4078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3987 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 02:55:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 02:55:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-19 02:55:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:00,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-03-19 02:55:00,843 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 97 [2022-03-19 02:55:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:00,844 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-03-19 02:55:00,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.9375) internal successors, (93), 47 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-03-19 02:55:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-19 02:55:00,844 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:00,844 INFO L500 BasicCegarLoop]: trace histogram [44, 42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:00,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-19 02:55:01,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:01,047 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:01,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:01,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1759855339, now seen corresponding path program 42 times [2022-03-19 02:55:01,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:01,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [395351854] [2022-03-19 02:55:01,069 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:01,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:01,112 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1264855889, now seen corresponding path program 1 times [2022-03-19 02:55:01,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:01,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266874272] [2022-03-19 02:55:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:01,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266874272] [2022-03-19 02:55:01,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266874272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428616857] [2022-03-19 02:55:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:01,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:01,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:01,177 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:01,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 02:55:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:01,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:01,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:01,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428616857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:01,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:01,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:55:02,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:55:02,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [395351854] [2022-03-19 02:55:02,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [395351854] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:55:02,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:55:02,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-19 02:55:02,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660153828] [2022-03-19 02:55:02,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:55:02,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 02:55:02,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 02:55:02,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=3348, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 02:55:02,698 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 50 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:05,128 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2022-03-19 02:55:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 02:55:05,128 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-03-19 02:55:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:05,129 INFO L225 Difference]: With dead ends: 110 [2022-03-19 02:55:05,129 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 02:55:05,130 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=927, Invalid=10415, Unknown=0, NotChecked=0, Total=11342 [2022-03-19 02:55:05,131 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4174 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 4267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:05,131 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 133 Invalid, 4267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4174 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 02:55:05,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 02:55:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-19 02:55:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-03-19 02:55:05,139 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 99 [2022-03-19 02:55:05,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:05,139 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-03-19 02:55:05,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-03-19 02:55:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 02:55:05,140 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:05,140 INFO L500 BasicCegarLoop]: trace histogram [45, 43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:05,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-19 02:55:05,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:05,340 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:05,341 INFO L85 PathProgramCache]: Analyzing trace with hash -759700986, now seen corresponding path program 43 times [2022-03-19 02:55:05,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:05,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1494962692] [2022-03-19 02:55:05,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:05,413 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:05,413 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:05,413 INFO L85 PathProgramCache]: Analyzing trace with hash 784676271, now seen corresponding path program 1 times [2022-03-19 02:55:05,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:05,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451420814] [2022-03-19 02:55:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:05,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:05,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:05,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:05,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451420814] [2022-03-19 02:55:05,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451420814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:05,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656357638] [2022-03-19 02:55:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:05,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:05,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:05,476 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:05,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 02:55:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:05,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:05,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:05,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:05,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656357638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:05,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:05,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:55:07,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:55:07,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1494962692] [2022-03-19 02:55:07,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1494962692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:55:07,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:55:07,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-19 02:55:07,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497708234] [2022-03-19 02:55:07,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:55:07,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-19 02:55:07,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:07,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-19 02:55:07,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=3464, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 02:55:07,141 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 51 states, 50 states have (on average 1.94) internal successors, (97), 49 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:09,868 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2022-03-19 02:55:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 02:55:09,871 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.94) internal successors, (97), 49 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-03-19 02:55:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:09,872 INFO L225 Difference]: With dead ends: 112 [2022-03-19 02:55:09,872 INFO L226 Difference]: Without dead ends: 105 [2022-03-19 02:55:09,873 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=946, Invalid=10826, Unknown=0, NotChecked=0, Total=11772 [2022-03-19 02:55:09,873 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 4595 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:09,874 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 243 Invalid, 4690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4595 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 02:55:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-19 02:55:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-03-19 02:55:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-03-19 02:55:09,883 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 101 [2022-03-19 02:55:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:09,883 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-03-19 02:55:09,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.94) internal successors, (97), 49 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-03-19 02:55:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 02:55:09,884 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:09,884 INFO L500 BasicCegarLoop]: trace histogram [46, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:09,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-19 02:55:10,091 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,SelfDestructingSolverStorable45 [2022-03-19 02:55:10,091 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:10,092 INFO L85 PathProgramCache]: Analyzing trace with hash 308225633, now seen corresponding path program 44 times [2022-03-19 02:55:10,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:10,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1314379410] [2022-03-19 02:55:10,109 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:10,154 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:10,154 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:10,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1460758865, now seen corresponding path program 1 times [2022-03-19 02:55:10,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:10,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251553421] [2022-03-19 02:55:10,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:10,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:10,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:10,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:10,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251553421] [2022-03-19 02:55:10,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251553421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:10,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561384938] [2022-03-19 02:55:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:10,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:10,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:10,214 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:10,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 02:55:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:10,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:10,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:10,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:10,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561384938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:10,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:10,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:55:11,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:55:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1314379410] [2022-03-19 02:55:11,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1314379410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:55:11,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:55:11,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-19 02:55:11,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717746928] [2022-03-19 02:55:11,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:55:11,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-19 02:55:11,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:11,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-19 02:55:11,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3582, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 02:55:11,856 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:14,527 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2022-03-19 02:55:14,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 02:55:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-03-19 02:55:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:14,528 INFO L225 Difference]: With dead ends: 114 [2022-03-19 02:55:14,528 INFO L226 Difference]: Without dead ends: 107 [2022-03-19 02:55:14,529 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=965, Invalid=11245, Unknown=0, NotChecked=0, Total=12210 [2022-03-19 02:55:14,529 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4584 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 4681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 4584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:14,529 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 193 Invalid, 4681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 4584 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 02:55:14,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-19 02:55:14,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-03-19 02:55:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-03-19 02:55:14,537 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 103 [2022-03-19 02:55:14,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:14,538 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-03-19 02:55:14,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-03-19 02:55:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 02:55:14,538 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:14,538 INFO L500 BasicCegarLoop]: trace histogram [47, 45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:14,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-19 02:55:14,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-19 02:55:14,752 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash 88522748, now seen corresponding path program 45 times [2022-03-19 02:55:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:14,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1677916252] [2022-03-19 02:55:14,792 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:14,849 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:14,849 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:14,850 INFO L85 PathProgramCache]: Analyzing trace with hash 588773295, now seen corresponding path program 1 times [2022-03-19 02:55:14,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:14,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455339157] [2022-03-19 02:55:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:14,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:14,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:14,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:14,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455339157] [2022-03-19 02:55:14,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455339157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:14,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508246669] [2022-03-19 02:55:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:14,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:14,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:14,929 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:14,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 02:55:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:14,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:14,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:15,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:15,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508246669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:15,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:15,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:55:16,584 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:55:16,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1677916252] [2022-03-19 02:55:16,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1677916252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:55:16,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:55:16,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-19 02:55:16,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605506884] [2022-03-19 02:55:16,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:55:16,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-19 02:55:16,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:16,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-19 02:55:16,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=3702, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 02:55:16,586 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:19,318 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2022-03-19 02:55:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 02:55:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-03-19 02:55:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:19,320 INFO L225 Difference]: With dead ends: 116 [2022-03-19 02:55:19,320 INFO L226 Difference]: Without dead ends: 109 [2022-03-19 02:55:19,321 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=984, Invalid=11672, Unknown=0, NotChecked=0, Total=12656 [2022-03-19 02:55:19,321 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 101 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4725 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 4824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:19,321 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 173 Invalid, 4824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4725 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 02:55:19,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-19 02:55:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-19 02:55:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-03-19 02:55:19,331 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 105 [2022-03-19 02:55:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:19,332 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-03-19 02:55:19,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:19,332 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-03-19 02:55:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 02:55:19,333 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:19,333 INFO L500 BasicCegarLoop]: trace histogram [48, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:19,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 02:55:19,556 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-19 02:55:19,556 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:19,556 INFO L85 PathProgramCache]: Analyzing trace with hash -592552233, now seen corresponding path program 46 times [2022-03-19 02:55:19,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:19,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [443710019] [2022-03-19 02:55:19,585 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:19,632 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:19,632 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1656661841, now seen corresponding path program 1 times [2022-03-19 02:55:19,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:19,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91825657] [2022-03-19 02:55:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:19,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:19,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:19,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:19,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91825657] [2022-03-19 02:55:19,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91825657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:19,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285252472] [2022-03-19 02:55:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:19,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:19,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:19,709 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:19,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 02:55:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:19,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:19,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:19,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:19,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285252472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:19,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:19,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-19 02:55:21,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:55:21,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [443710019] [2022-03-19 02:55:21,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [443710019] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:55:21,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:55:21,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-19 02:55:21,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438616871] [2022-03-19 02:55:21,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:55:21,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-19 02:55:21,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:21,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-19 02:55:21,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=3754, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 02:55:21,427 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:24,345 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2022-03-19 02:55:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 02:55:24,345 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-03-19 02:55:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:24,346 INFO L225 Difference]: With dead ends: 118 [2022-03-19 02:55:24,346 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 02:55:24,347 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=894, Invalid=11988, Unknown=0, NotChecked=0, Total=12882 [2022-03-19 02:55:24,347 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4969 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 5070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:24,348 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 158 Invalid, 5070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4969 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 02:55:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 02:55:24,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-19 02:55:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 106 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-03-19 02:55:24,359 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 107 [2022-03-19 02:55:24,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:24,359 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-03-19 02:55:24,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-03-19 02:55:24,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-19 02:55:24,360 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:24,360 INFO L500 BasicCegarLoop]: trace histogram [49, 47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:24,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 02:55:24,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:24,575 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2024387314, now seen corresponding path program 47 times [2022-03-19 02:55:24,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:24,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304476006] [2022-03-19 02:55:24,601 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:24,635 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:24,635 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:24,635 INFO L85 PathProgramCache]: Analyzing trace with hash 392870319, now seen corresponding path program 1 times [2022-03-19 02:55:24,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:24,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972922521] [2022-03-19 02:55:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:24,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:24,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:24,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972922521] [2022-03-19 02:55:24,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972922521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:24,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821560098] [2022-03-19 02:55:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:24,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:24,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:24,696 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:24,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 02:55:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:24,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:24,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:24,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:24,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821560098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:24,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:24,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:55:26,450 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:55:26,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304476006] [2022-03-19 02:55:26,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304476006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:55:26,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:55:26,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-19 02:55:26,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450287077] [2022-03-19 02:55:26,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:55:26,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 02:55:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 02:55:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=3948, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 02:55:26,451 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:29,419 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2022-03-19 02:55:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-19 02:55:29,419 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-03-19 02:55:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:29,419 INFO L225 Difference]: With dead ends: 120 [2022-03-19 02:55:29,420 INFO L226 Difference]: Without dead ends: 113 [2022-03-19 02:55:29,420 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1022, Invalid=12550, Unknown=0, NotChecked=0, Total=13572 [2022-03-19 02:55:29,421 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5184 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 5287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 5184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:29,421 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 208 Invalid, 5287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 5184 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 02:55:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-19 02:55:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-19 02:55:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-03-19 02:55:29,435 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 109 [2022-03-19 02:55:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:29,435 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-03-19 02:55:29,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-03-19 02:55:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 02:55:29,436 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:29,436 INFO L500 BasicCegarLoop]: trace histogram [50, 48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:29,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 02:55:29,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 02:55:29,647 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash 52456525, now seen corresponding path program 48 times [2022-03-19 02:55:29,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:29,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [621957894] [2022-03-19 02:55:29,672 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:29,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:29,716 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:29,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1852564817, now seen corresponding path program 1 times [2022-03-19 02:55:29,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:29,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812969069] [2022-03-19 02:55:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:29,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:29,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:29,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:29,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812969069] [2022-03-19 02:55:29,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812969069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:29,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731473736] [2022-03-19 02:55:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:29,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:29,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:29,794 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:29,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 02:55:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:29,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:29,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:29,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:30,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731473736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:30,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:30,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-19 02:55:31,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:55:31,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [621957894] [2022-03-19 02:55:31,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [621957894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:55:31,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:55:31,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-19 02:55:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339837806] [2022-03-19 02:55:31,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:55:31,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-19 02:55:31,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:31,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-19 02:55:31,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=4155, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 02:55:31,795 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 56 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 54 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:35,002 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2022-03-19 02:55:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-19 02:55:35,003 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 54 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-03-19 02:55:35,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:35,003 INFO L225 Difference]: With dead ends: 122 [2022-03-19 02:55:35,004 INFO L226 Difference]: Without dead ends: 115 [2022-03-19 02:55:35,005 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2830 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1145, Invalid=13135, Unknown=0, NotChecked=0, Total=14280 [2022-03-19 02:55:35,005 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 107 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 5616 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 5721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 5616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:35,005 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 273 Invalid, 5721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 5616 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 02:55:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-19 02:55:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-19 02:55:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 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) [2022-03-19 02:55:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-03-19 02:55:35,016 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 111 [2022-03-19 02:55:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:35,016 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-03-19 02:55:35,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 54 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-03-19 02:55:35,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 02:55:35,017 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:35,017 INFO L500 BasicCegarLoop]: trace histogram [51, 49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:35,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-19 02:55:35,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:35,240 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash -892454168, now seen corresponding path program 49 times [2022-03-19 02:55:35,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:35,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2103325897] [2022-03-19 02:55:35,259 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:35,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:35,321 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:35,322 INFO L85 PathProgramCache]: Analyzing trace with hash 196967343, now seen corresponding path program 1 times [2022-03-19 02:55:35,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:35,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336346054] [2022-03-19 02:55:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:35,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:35,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:35,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:35,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336346054] [2022-03-19 02:55:35,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336346054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:35,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781346037] [2022-03-19 02:55:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:35,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:35,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:35,396 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:35,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 02:55:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:35,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:35,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:35,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781346037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:35,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:35,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:55:37,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:55:37,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2103325897] [2022-03-19 02:55:37,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2103325897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:55:37,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:55:37,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-19 02:55:37,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924029026] [2022-03-19 02:55:37,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:55:37,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 02:55:37,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:37,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 02:55:37,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=4202, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 02:55:37,296 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 57 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:40,465 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2022-03-19 02:55:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 02:55:40,465 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-03-19 02:55:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:40,466 INFO L225 Difference]: With dead ends: 124 [2022-03-19 02:55:40,466 INFO L226 Difference]: Without dead ends: 117 [2022-03-19 02:55:40,467 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1060, Invalid=13460, Unknown=0, NotChecked=0, Total=14520 [2022-03-19 02:55:40,468 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 5544 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 5651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 5544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:40,468 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 148 Invalid, 5651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 5544 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 02:55:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-19 02:55:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-03-19 02:55:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-03-19 02:55:40,479 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 113 [2022-03-19 02:55:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:40,479 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-03-19 02:55:40,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-03-19 02:55:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-19 02:55:40,480 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:40,480 INFO L500 BasicCegarLoop]: trace histogram [52, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:40,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 02:55:40,704 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,SelfDestructingSolverStorable51 [2022-03-19 02:55:40,704 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:40,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1581436611, now seen corresponding path program 50 times [2022-03-19 02:55:40,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:40,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [436594292] [2022-03-19 02:55:40,724 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:40,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:40,760 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2048467793, now seen corresponding path program 1 times [2022-03-19 02:55:40,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:40,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558758588] [2022-03-19 02:55:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:40,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:40,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:40,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:40,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558758588] [2022-03-19 02:55:40,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558758588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:40,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107912151] [2022-03-19 02:55:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:40,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:40,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:40,832 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:40,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 02:55:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:40,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:40,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:41,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:41,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107912151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:41,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:41,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:55:42,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:55:42,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [436594292] [2022-03-19 02:55:42,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [436594292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:55:42,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:55:42,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-19 02:55:42,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023470215] [2022-03-19 02:55:42,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:55:42,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-19 02:55:42,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-19 02:55:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=4332, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 02:55:42,781 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 58 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:46,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:46,058 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2022-03-19 02:55:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-19 02:55:46,059 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-03-19 02:55:46,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:46,059 INFO L225 Difference]: With dead ends: 126 [2022-03-19 02:55:46,059 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 02:55:46,061 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1079, Invalid=13927, Unknown=0, NotChecked=0, Total=15006 [2022-03-19 02:55:46,061 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5883 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 5992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 5883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:46,061 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 208 Invalid, 5992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 5883 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-19 02:55:46,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 02:55:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-19 02:55:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-03-19 02:55:46,069 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 115 [2022-03-19 02:55:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:46,069 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-03-19 02:55:46,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:46,069 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-03-19 02:55:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-19 02:55:46,069 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:46,070 INFO L500 BasicCegarLoop]: trace histogram [53, 51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:46,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 02:55:46,283 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,SelfDestructingSolverStorable52 [2022-03-19 02:55:46,284 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash -421406754, now seen corresponding path program 51 times [2022-03-19 02:55:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:46,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1720813109] [2022-03-19 02:55:46,303 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:46,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:46,336 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:46,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1064367, now seen corresponding path program 1 times [2022-03-19 02:55:46,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:46,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272970765] [2022-03-19 02:55:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:46,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:46,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:46,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272970765] [2022-03-19 02:55:46,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272970765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:46,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126928679] [2022-03-19 02:55:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:46,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:46,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:46,412 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:46,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 02:55:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:46,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:46,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:46,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:46,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126928679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:46,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:46,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-19 02:55:48,398 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:55:48,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1720813109] [2022-03-19 02:55:48,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1720813109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:55:48,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:55:48,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-19 02:55:48,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887870811] [2022-03-19 02:55:48,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:55:48,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-19 02:55:48,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:48,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-19 02:55:48,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=4389, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 02:55:48,399 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 59 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:51,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:51,785 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2022-03-19 02:55:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-19 02:55:51,786 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-03-19 02:55:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:51,787 INFO L225 Difference]: With dead ends: 128 [2022-03-19 02:55:51,787 INFO L226 Difference]: Without dead ends: 121 [2022-03-19 02:55:51,788 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=979, Invalid=14273, Unknown=0, NotChecked=0, Total=15252 [2022-03-19 02:55:51,788 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 113 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6029 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 6140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 6029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:51,788 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 223 Invalid, 6140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 6029 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-19 02:55:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-19 02:55:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-19 02:55:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 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) [2022-03-19 02:55:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-03-19 02:55:51,798 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 117 [2022-03-19 02:55:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:51,798 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-03-19 02:55:51,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-03-19 02:55:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-19 02:55:51,799 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:51,799 INFO L500 BasicCegarLoop]: trace histogram [54, 52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:51,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 02:55:52,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:52,007 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1008531911, now seen corresponding path program 52 times [2022-03-19 02:55:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:52,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1615145626] [2022-03-19 02:55:52,030 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:52,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:52,073 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:52,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2050596527, now seen corresponding path program 1 times [2022-03-19 02:55:52,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:52,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742139909] [2022-03-19 02:55:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:52,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:52,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:52,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742139909] [2022-03-19 02:55:52,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742139909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552318090] [2022-03-19 02:55:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:52,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:52,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:52,148 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:52,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 02:55:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:52,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:52,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:52,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:52,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552318090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:52,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:52,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:55:54,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:55:54,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1615145626] [2022-03-19 02:55:54,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1615145626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:55:54,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:55:54,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-19 02:55:54,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391023048] [2022-03-19 02:55:54,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:55:54,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-19 02:55:54,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-19 02:55:54,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=4598, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 02:55:54,181 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 60 states, 59 states have (on average 1.9491525423728813) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:57,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:55:57,714 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2022-03-19 02:55:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 02:55:57,714 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.9491525423728813) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-03-19 02:55:57,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:55:57,715 INFO L225 Difference]: With dead ends: 130 [2022-03-19 02:55:57,715 INFO L226 Difference]: Without dead ends: 123 [2022-03-19 02:55:57,716 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3043 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1117, Invalid=14885, Unknown=0, NotChecked=0, Total=16002 [2022-03-19 02:55:57,716 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 6275 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 6388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 6275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:55:57,716 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 238 Invalid, 6388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 6275 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 02:55:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-19 02:55:57,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-03-19 02:55:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 118 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-03-19 02:55:57,727 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 119 [2022-03-19 02:55:57,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:55:57,727 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-03-19 02:55:57,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.9491525423728813) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:55:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-03-19 02:55:57,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-19 02:55:57,728 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:55:57,728 INFO L500 BasicCegarLoop]: trace histogram [55, 53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:55:57,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 02:55:57,943 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,SelfDestructingSolverStorable54 [2022-03-19 02:55:57,943 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:55:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:55:57,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1699875284, now seen corresponding path program 53 times [2022-03-19 02:55:57,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:55:57,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045206078] [2022-03-19 02:55:57,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:58,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:55:58,027 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:55:58,027 INFO L85 PathProgramCache]: Analyzing trace with hash -194838609, now seen corresponding path program 1 times [2022-03-19 02:55:58,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:55:58,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759872703] [2022-03-19 02:55:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:58,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:55:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:58,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:55:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:58,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:55:58,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759872703] [2022-03-19 02:55:58,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759872703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:55:58,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297250500] [2022-03-19 02:55:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:55:58,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:55:58,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:55:58,100 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:55:58,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 02:55:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:55:58,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:55:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:55:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:58,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:55:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:55:58,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297250500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:55:58,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:55:58,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-19 02:56:00,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:56:00,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1045206078] [2022-03-19 02:56:00,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1045206078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:56:00,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:56:00,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-19 02:56:00,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718900523] [2022-03-19 02:56:00,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:56:00,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-19 02:56:00,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:00,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-19 02:56:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=4657, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 02:56:00,178 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 61 states, 60 states have (on average 1.95) internal successors, (117), 59 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:56:03,818 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2022-03-19 02:56:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-19 02:56:03,819 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.95) internal successors, (117), 59 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-03-19 02:56:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:56:03,819 INFO L225 Difference]: With dead ends: 132 [2022-03-19 02:56:03,819 INFO L226 Difference]: Without dead ends: 125 [2022-03-19 02:56:03,821 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3004 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1013, Invalid=15243, Unknown=0, NotChecked=0, Total=16256 [2022-03-19 02:56:03,821 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6426 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 6541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 6426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:56:03,821 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 208 Invalid, 6541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 6426 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 02:56:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-19 02:56:03,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-03-19 02:56:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-03-19 02:56:03,832 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 121 [2022-03-19 02:56:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:56:03,833 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-03-19 02:56:03,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.95) internal successors, (117), 59 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-03-19 02:56:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-19 02:56:03,833 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:56:03,834 INFO L500 BasicCegarLoop]: trace histogram [56, 54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:56:03,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-19 02:56:04,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-19 02:56:04,058 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:56:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:56:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1729008303, now seen corresponding path program 54 times [2022-03-19 02:56:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:04,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1801358498] [2022-03-19 02:56:04,080 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:04,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:04,122 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:56:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1854693551, now seen corresponding path program 1 times [2022-03-19 02:56:04,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:56:04,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423483562] [2022-03-19 02:56:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:04,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:56:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:04,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:56:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:04,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:56:04,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423483562] [2022-03-19 02:56:04,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423483562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:56:04,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274506845] [2022-03-19 02:56:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:04,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:04,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:56:04,203 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:56:04,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 02:56:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:04,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:56:04,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:56:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:04,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:56:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:04,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274506845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:56:04,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:56:04,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:56:06,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:56:06,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1801358498] [2022-03-19 02:56:06,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1801358498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:56:06,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:56:06,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-19 02:56:06,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132953225] [2022-03-19 02:56:06,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:56:06,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-19 02:56:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-19 02:56:06,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=4872, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 02:56:06,356 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:56:10,191 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2022-03-19 02:56:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-19 02:56:10,192 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-03-19 02:56:10,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:56:10,192 INFO L225 Difference]: With dead ends: 134 [2022-03-19 02:56:10,192 INFO L226 Difference]: Without dead ends: 127 [2022-03-19 02:56:10,193 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1155, Invalid=15875, Unknown=0, NotChecked=0, Total=17030 [2022-03-19 02:56:10,193 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 119 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 6916 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 7033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 6916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:56:10,193 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 283 Invalid, 7033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 6916 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 02:56:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-19 02:56:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-19 02:56:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 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) [2022-03-19 02:56:10,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-03-19 02:56:10,201 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 123 [2022-03-19 02:56:10,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:56:10,201 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-03-19 02:56:10,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-03-19 02:56:10,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-19 02:56:10,202 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:56:10,202 INFO L500 BasicCegarLoop]: trace histogram [57, 55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:56:10,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-19 02:56:10,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:10,402 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:56:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:56:10,402 INFO L85 PathProgramCache]: Analyzing trace with hash -338931510, now seen corresponding path program 55 times [2022-03-19 02:56:10,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:10,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1055751718] [2022-03-19 02:56:10,426 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:10,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:10,470 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:56:10,470 INFO L85 PathProgramCache]: Analyzing trace with hash -390741585, now seen corresponding path program 1 times [2022-03-19 02:56:10,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:56:10,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069503430] [2022-03-19 02:56:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:10,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:56:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:10,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:56:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:10,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:56:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069503430] [2022-03-19 02:56:10,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069503430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:56:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848648792] [2022-03-19 02:56:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:10,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:10,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:56:10,531 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:56:10,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 02:56:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:10,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:56:10,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:56:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:10,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:56:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848648792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:56:10,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:56:10,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:56:12,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:56:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1055751718] [2022-03-19 02:56:12,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1055751718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:56:12,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:56:12,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-19 02:56:12,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748298066] [2022-03-19 02:56:12,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:56:12,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-19 02:56:12,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:12,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-19 02:56:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=5012, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 02:56:12,711 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 63 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 61 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:56:16,529 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2022-03-19 02:56:16,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-19 02:56:16,529 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 61 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-03-19 02:56:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:56:16,530 INFO L225 Difference]: With dead ends: 136 [2022-03-19 02:56:16,530 INFO L226 Difference]: Without dead ends: 129 [2022-03-19 02:56:16,531 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3292 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1174, Invalid=16382, Unknown=0, NotChecked=0, Total=17556 [2022-03-19 02:56:16,531 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 6674 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 6674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:56:16,531 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 118 Invalid, 6793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 6674 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 02:56:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-19 02:56:16,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-19 02:56:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-03-19 02:56:16,543 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 125 [2022-03-19 02:56:16,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:56:16,543 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-03-19 02:56:16,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 61 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:16,543 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-03-19 02:56:16,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 02:56:16,544 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:56:16,544 INFO L500 BasicCegarLoop]: trace histogram [58, 56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:56:16,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-19 02:56:16,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:16,763 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:56:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:56:16,764 INFO L85 PathProgramCache]: Analyzing trace with hash 940766245, now seen corresponding path program 56 times [2022-03-19 02:56:16,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:16,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1479126528] [2022-03-19 02:56:16,786 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:16,834 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:16,834 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:56:16,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1658790575, now seen corresponding path program 1 times [2022-03-19 02:56:16,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:56:16,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077669361] [2022-03-19 02:56:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:16,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:56:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:16,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:56:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:16,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:56:16,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077669361] [2022-03-19 02:56:16,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077669361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:56:16,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075903865] [2022-03-19 02:56:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:16,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:16,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:56:16,898 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:56:16,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 02:56:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:16,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:56:16,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:56:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:17,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:56:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:17,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075903865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:56:17,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:56:17,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:56:19,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:56:19,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1479126528] [2022-03-19 02:56:19,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1479126528] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:56:19,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:56:19,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-19 02:56:19,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739331674] [2022-03-19 02:56:19,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:56:19,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-19 02:56:19,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:19,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-19 02:56:19,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=5154, Unknown=0, NotChecked=0, Total=5700 [2022-03-19 02:56:19,140 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 64 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:56:23,193 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2022-03-19 02:56:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-19 02:56:23,193 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-03-19 02:56:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:56:23,194 INFO L225 Difference]: With dead ends: 138 [2022-03-19 02:56:23,194 INFO L226 Difference]: Without dead ends: 131 [2022-03-19 02:56:23,195 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3377 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1193, Invalid=16897, Unknown=0, NotChecked=0, Total=18090 [2022-03-19 02:56:23,195 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 7222 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 7343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 7222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:56:23,195 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 263 Invalid, 7343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 7222 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-19 02:56:23,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-19 02:56:23,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-19 02:56:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-03-19 02:56:23,203 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 127 [2022-03-19 02:56:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:56:23,203 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-03-19 02:56:23,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-03-19 02:56:23,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 02:56:23,204 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:56:23,204 INFO L500 BasicCegarLoop]: trace histogram [59, 57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:56:23,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-19 02:56:23,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:23,405 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:56:23,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:56:23,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1925305152, now seen corresponding path program 57 times [2022-03-19 02:56:23,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:23,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [453975289] [2022-03-19 02:56:23,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:23,457 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:23,457 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:56:23,457 INFO L85 PathProgramCache]: Analyzing trace with hash -586644561, now seen corresponding path program 1 times [2022-03-19 02:56:23,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:56:23,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254502914] [2022-03-19 02:56:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:23,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:56:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:23,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:56:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:23,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:56:23,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254502914] [2022-03-19 02:56:23,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254502914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:56:23,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166969864] [2022-03-19 02:56:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:23,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:23,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:56:23,527 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:56:23,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 02:56:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:56:23,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:56:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:23,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:56:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:23,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166969864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:56:23,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:56:23,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:56:25,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:56:25,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [453975289] [2022-03-19 02:56:25,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [453975289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:56:25,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:56:25,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-19 02:56:25,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865378241] [2022-03-19 02:56:25,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:56:25,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-19 02:56:25,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:25,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-19 02:56:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=5298, Unknown=0, NotChecked=0, Total=5852 [2022-03-19 02:56:25,770 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 65 states, 64 states have (on average 1.953125) internal successors, (125), 63 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:56:29,800 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2022-03-19 02:56:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 02:56:29,801 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.953125) internal successors, (125), 63 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-03-19 02:56:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:56:29,801 INFO L225 Difference]: With dead ends: 140 [2022-03-19 02:56:29,802 INFO L226 Difference]: Without dead ends: 133 [2022-03-19 02:56:29,802 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3463 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1212, Invalid=17420, Unknown=0, NotChecked=0, Total=18632 [2022-03-19 02:56:29,803 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 125 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 6960 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 6960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:56:29,803 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 38 Invalid, 7083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 6960 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 02:56:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-19 02:56:29,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-19 02:56:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.03125) internal successors, (132), 128 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) [2022-03-19 02:56:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-03-19 02:56:29,815 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 129 [2022-03-19 02:56:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:56:29,815 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-03-19 02:56:29,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.953125) internal successors, (125), 63 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:29,815 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-03-19 02:56:29,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-19 02:56:29,816 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:56:29,816 INFO L500 BasicCegarLoop]: trace histogram [60, 58, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:56:29,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-19 02:56:30,038 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,SelfDestructingSolverStorable59 [2022-03-19 02:56:30,038 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:56:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:56:30,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1149086363, now seen corresponding path program 58 times [2022-03-19 02:56:30,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:30,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1660492102] [2022-03-19 02:56:30,056 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:30,100 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:30,100 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:56:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1462887599, now seen corresponding path program 1 times [2022-03-19 02:56:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:56:30,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582934310] [2022-03-19 02:56:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:30,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:56:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:30,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:56:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:30,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:56:30,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582934310] [2022-03-19 02:56:30,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582934310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:56:30,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804125905] [2022-03-19 02:56:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:30,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:30,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:56:30,168 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:56:30,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 02:56:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:56:30,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:56:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:30,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:56:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:30,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804125905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:56:30,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:56:30,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:56:32,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:56:32,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1660492102] [2022-03-19 02:56:32,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1660492102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:56:32,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:56:32,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-19 02:56:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201329617] [2022-03-19 02:56:32,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:56:32,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-19 02:56:32,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:32,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-19 02:56:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=5444, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 02:56:32,509 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 66 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:56:36,798 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2022-03-19 02:56:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-19 02:56:36,798 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-03-19 02:56:36,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:56:36,798 INFO L225 Difference]: With dead ends: 142 [2022-03-19 02:56:36,798 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 02:56:36,799 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3550 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1231, Invalid=17951, Unknown=0, NotChecked=0, Total=19182 [2022-03-19 02:56:36,799 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 7606 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 7731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 7606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:56:36,800 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 173 Invalid, 7731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 7606 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 02:56:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 02:56:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-03-19 02:56:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-03-19 02:56:36,811 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 131 [2022-03-19 02:56:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:56:36,811 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-03-19 02:56:36,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-03-19 02:56:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 02:56:36,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:56:36,812 INFO L500 BasicCegarLoop]: trace histogram [61, 59, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:56:36,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-19 02:56:37,012 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,SelfDestructingSolverStorable60 [2022-03-19 02:56:37,012 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:56:37,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:56:37,012 INFO L85 PathProgramCache]: Analyzing trace with hash 701832630, now seen corresponding path program 59 times [2022-03-19 02:56:37,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:37,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [433423096] [2022-03-19 02:56:37,031 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:37,087 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:37,087 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:56:37,088 INFO L85 PathProgramCache]: Analyzing trace with hash -782547537, now seen corresponding path program 1 times [2022-03-19 02:56:37,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:56:37,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665252314] [2022-03-19 02:56:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:37,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:56:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:37,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:56:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:37,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:56:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665252314] [2022-03-19 02:56:37,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665252314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:56:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538346487] [2022-03-19 02:56:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:37,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:56:37,160 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:56:37,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 02:56:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:37,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:56:37,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:56:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:37,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:56:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:37,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538346487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:56:37,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:56:37,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:56:39,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:56:39,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [433423096] [2022-03-19 02:56:39,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [433423096] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:56:39,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:56:39,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-19 02:56:39,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152211665] [2022-03-19 02:56:39,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:56:39,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-19 02:56:39,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-19 02:56:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=5592, Unknown=0, NotChecked=0, Total=6162 [2022-03-19 02:56:39,496 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 65 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:56:43,832 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2022-03-19 02:56:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 02:56:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 65 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-03-19 02:56:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:56:43,834 INFO L225 Difference]: With dead ends: 144 [2022-03-19 02:56:43,834 INFO L226 Difference]: Without dead ends: 137 [2022-03-19 02:56:43,835 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3638 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1250, Invalid=18490, Unknown=0, NotChecked=0, Total=19740 [2022-03-19 02:56:43,835 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 7585 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 7712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 7585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:56:43,835 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 53 Invalid, 7712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 7585 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 02:56:43,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-19 02:56:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-19 02:56:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-03-19 02:56:43,844 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 133 [2022-03-19 02:56:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:56:43,844 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-03-19 02:56:43,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 65 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-03-19 02:56:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 02:56:43,844 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:56:43,844 INFO L500 BasicCegarLoop]: trace histogram [62, 60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:56:43,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-19 02:56:44,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-19 02:56:44,045 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:56:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:56:44,045 INFO L85 PathProgramCache]: Analyzing trace with hash 387724817, now seen corresponding path program 60 times [2022-03-19 02:56:44,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:44,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2023204228] [2022-03-19 02:56:44,063 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:44,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:44,112 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:56:44,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1266984623, now seen corresponding path program 1 times [2022-03-19 02:56:44,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:56:44,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062895010] [2022-03-19 02:56:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:44,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:56:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:44,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:56:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:44,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:56:44,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062895010] [2022-03-19 02:56:44,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062895010] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:56:44,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814963985] [2022-03-19 02:56:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:44,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:56:44,181 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:56:44,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 02:56:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:44,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:56:44,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:56:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:44,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:56:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:44,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814963985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:56:44,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:56:44,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:56:46,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:56:46,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2023204228] [2022-03-19 02:56:46,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2023204228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:56:46,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:56:46,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-19 02:56:46,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578093411] [2022-03-19 02:56:46,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:56:46,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-19 02:56:46,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:46,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-19 02:56:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=5742, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 02:56:46,606 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:56:51,002 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2022-03-19 02:56:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-19 02:56:51,003 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-03-19 02:56:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:56:51,003 INFO L225 Difference]: With dead ends: 146 [2022-03-19 02:56:51,003 INFO L226 Difference]: Without dead ends: 139 [2022-03-19 02:56:51,004 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3727 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1269, Invalid=19037, Unknown=0, NotChecked=0, Total=20306 [2022-03-19 02:56:51,004 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 131 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7672 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 7801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 7672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:56:51,006 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 33 Invalid, 7801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 7672 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 02:56:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-19 02:56:51,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-19 02:56:51,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 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) [2022-03-19 02:56:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-03-19 02:56:51,016 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 135 [2022-03-19 02:56:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:56:51,016 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-03-19 02:56:51,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-03-19 02:56:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-19 02:56:51,018 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:56:51,018 INFO L500 BasicCegarLoop]: trace histogram [63, 61, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:56:51,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-19 02:56:51,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:51,218 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:56:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:56:51,219 INFO L85 PathProgramCache]: Analyzing trace with hash -822172756, now seen corresponding path program 61 times [2022-03-19 02:56:51,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:51,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [910535034] [2022-03-19 02:56:51,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:51,269 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:51,270 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:56:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash -978450513, now seen corresponding path program 1 times [2022-03-19 02:56:51,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:56:51,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920909748] [2022-03-19 02:56:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:51,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:56:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:51,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:56:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:51,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:56:51,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920909748] [2022-03-19 02:56:51,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920909748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:56:51,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050292447] [2022-03-19 02:56:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:51,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:51,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:56:51,333 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:56:51,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 02:56:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:51,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:56:51,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:56:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:51,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:56:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:51,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050292447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:56:51,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:56:51,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:56:53,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:56:53,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [910535034] [2022-03-19 02:56:53,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [910535034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:56:53,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:56:53,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-19 02:56:53,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674289785] [2022-03-19 02:56:53,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:56:53,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-19 02:56:53,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:53,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-19 02:56:53,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=5894, Unknown=0, NotChecked=0, Total=6480 [2022-03-19 02:56:53,811 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 69 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 67 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:58,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:56:58,518 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2022-03-19 02:56:58,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 02:56:58,518 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 67 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-03-19 02:56:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:56:58,519 INFO L225 Difference]: With dead ends: 148 [2022-03-19 02:56:58,519 INFO L226 Difference]: Without dead ends: 141 [2022-03-19 02:56:58,521 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3817 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1288, Invalid=19592, Unknown=0, NotChecked=0, Total=20880 [2022-03-19 02:56:58,521 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 133 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 8402 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 8533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 8402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:56:58,521 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 198 Invalid, 8533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 8402 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-19 02:56:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-19 02:56:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-03-19 02:56:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-03-19 02:56:58,534 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 137 [2022-03-19 02:56:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:56:58,534 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-03-19 02:56:58,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 67 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:56:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-03-19 02:56:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-19 02:56:58,535 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:56:58,535 INFO L500 BasicCegarLoop]: trace histogram [64, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:56:58,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-19 02:56:58,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:58,747 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:56:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:56:58,748 INFO L85 PathProgramCache]: Analyzing trace with hash 402396807, now seen corresponding path program 62 times [2022-03-19 02:56:58,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:56:58,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1273741729] [2022-03-19 02:56:58,766 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:58,799 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:56:58,800 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:56:58,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1071081647, now seen corresponding path program 1 times [2022-03-19 02:56:58,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:56:58,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893257126] [2022-03-19 02:56:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:58,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:56:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:58,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:56:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:58,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:56:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893257126] [2022-03-19 02:56:58,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893257126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:56:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338267817] [2022-03-19 02:56:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:56:58,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:56:58,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:56:58,871 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:56:58,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 02:56:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:56:58,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:56:58,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:56:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:59,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:56:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:56:59,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338267817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:56:59,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:56:59,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:57:01,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:57:01,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1273741729] [2022-03-19 02:57:01,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1273741729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:57:01,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:57:01,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-19 02:57:01,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507591618] [2022-03-19 02:57:01,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:57:01,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-19 02:57:01,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-19 02:57:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=6048, Unknown=0, NotChecked=0, Total=6642 [2022-03-19 02:57:01,441 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 68 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:06,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:57:06,155 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2022-03-19 02:57:06,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-19 02:57:06,155 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 68 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-03-19 02:57:06,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:57:06,156 INFO L225 Difference]: With dead ends: 150 [2022-03-19 02:57:06,156 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 02:57:06,157 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1307, Invalid=20155, Unknown=0, NotChecked=0, Total=21462 [2022-03-19 02:57:06,157 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 8372 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 8505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 8372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:57:06,158 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 123 Invalid, 8505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 8372 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-19 02:57:06,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 02:57:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-03-19 02:57:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-03-19 02:57:06,167 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 139 [2022-03-19 02:57:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:57:06,167 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-03-19 02:57:06,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 68 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-03-19 02:57:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 02:57:06,168 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:57:06,168 INFO L500 BasicCegarLoop]: trace histogram [65, 63, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:57:06,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-19 02:57:06,368 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,SelfDestructingSolverStorable64 [2022-03-19 02:57:06,369 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:57:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:57:06,369 INFO L85 PathProgramCache]: Analyzing trace with hash 392707746, now seen corresponding path program 63 times [2022-03-19 02:57:06,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:06,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1507234437] [2022-03-19 02:57:06,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:06,426 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:06,426 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:57:06,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1174353489, now seen corresponding path program 1 times [2022-03-19 02:57:06,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:57:06,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966978129] [2022-03-19 02:57:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:06,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:57:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:06,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:57:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:06,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:57:06,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966978129] [2022-03-19 02:57:06,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966978129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:57:06,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143183712] [2022-03-19 02:57:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:06,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:57:06,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:57:06,512 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:57:06,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 02:57:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:06,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:57:06,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:57:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:06,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:57:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:06,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143183712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:57:06,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:57:06,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:57:09,137 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:57:09,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1507234437] [2022-03-19 02:57:09,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1507234437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:57:09,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:57:09,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-19 02:57:09,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191325766] [2022-03-19 02:57:09,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:57:09,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-19 02:57:09,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-19 02:57:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=6204, Unknown=0, NotChecked=0, Total=6806 [2022-03-19 02:57:09,139 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 71 states, 70 states have (on average 1.957142857142857) internal successors, (137), 69 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:57:14,174 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2022-03-19 02:57:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 02:57:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.957142857142857) internal successors, (137), 69 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-03-19 02:57:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:57:14,175 INFO L225 Difference]: With dead ends: 152 [2022-03-19 02:57:14,175 INFO L226 Difference]: Without dead ends: 145 [2022-03-19 02:57:14,176 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1326, Invalid=20726, Unknown=0, NotChecked=0, Total=22052 [2022-03-19 02:57:14,176 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 137 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 9224 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 9359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 9224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:57:14,176 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 338 Invalid, 9359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 9224 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-19 02:57:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-19 02:57:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-19 02:57:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 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) [2022-03-19 02:57:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-03-19 02:57:14,187 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 141 [2022-03-19 02:57:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:57:14,187 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-03-19 02:57:14,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.957142857142857) internal successors, (137), 69 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-03-19 02:57:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 02:57:14,188 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:57:14,188 INFO L500 BasicCegarLoop]: trace histogram [66, 64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:57:14,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-19 02:57:14,388 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,SelfDestructingSolverStorable65 [2022-03-19 02:57:14,389 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:57:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:57:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash -328545283, now seen corresponding path program 64 times [2022-03-19 02:57:14,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:14,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1704339617] [2022-03-19 02:57:14,413 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:14,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:14,465 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:57:14,468 INFO L85 PathProgramCache]: Analyzing trace with hash 875178671, now seen corresponding path program 1 times [2022-03-19 02:57:14,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:57:14,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322448422] [2022-03-19 02:57:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:14,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:57:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:14,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:57:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:14,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:57:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322448422] [2022-03-19 02:57:14,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322448422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:57:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049091041] [2022-03-19 02:57:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:14,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:57:14,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:57:14,534 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:57:14,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 02:57:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:14,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:57:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:57:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:14,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:57:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:14,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049091041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:57:14,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:57:14,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:57:17,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:57:17,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1704339617] [2022-03-19 02:57:17,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1704339617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:57:17,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:57:17,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-19 02:57:17,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4916226] [2022-03-19 02:57:17,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:57:17,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-19 02:57:17,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:17,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-19 02:57:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=6362, Unknown=0, NotChecked=0, Total=6972 [2022-03-19 02:57:17,222 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 72 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:57:22,347 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2022-03-19 02:57:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-19 02:57:22,348 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-19 02:57:22,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:57:22,348 INFO L225 Difference]: With dead ends: 154 [2022-03-19 02:57:22,348 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 02:57:22,350 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1345, Invalid=21305, Unknown=0, NotChecked=0, Total=22650 [2022-03-19 02:57:22,350 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 139 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 9355 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 9492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 9355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:57:22,350 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 278 Invalid, 9492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 9355 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-19 02:57:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 02:57:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-19 02:57:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.028169014084507) internal successors, (146), 142 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-03-19 02:57:22,364 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 143 [2022-03-19 02:57:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:57:22,364 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-03-19 02:57:22,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:22,364 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-03-19 02:57:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-19 02:57:22,365 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:57:22,365 INFO L500 BasicCegarLoop]: trace histogram [67, 65, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:57:22,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-19 02:57:22,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:57:22,575 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:57:22,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:57:22,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1962971496, now seen corresponding path program 65 times [2022-03-19 02:57:22,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:22,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813031128] [2022-03-19 02:57:22,593 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:22,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:22,637 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:57:22,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1370256465, now seen corresponding path program 1 times [2022-03-19 02:57:22,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:57:22,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624926431] [2022-03-19 02:57:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:22,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:57:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:22,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:57:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:22,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:57:22,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624926431] [2022-03-19 02:57:22,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624926431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:57:22,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043350777] [2022-03-19 02:57:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:22,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:57:22,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:57:22,695 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:57:22,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-19 02:57:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:22,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:57:22,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:57:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:22,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:57:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:22,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043350777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:57:22,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:57:22,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:57:25,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:57:25,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813031128] [2022-03-19 02:57:25,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813031128] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:57:25,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:57:25,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-19 02:57:25,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947663121] [2022-03-19 02:57:25,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:57:25,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-19 02:57:25,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-19 02:57:25,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=6522, Unknown=0, NotChecked=0, Total=7140 [2022-03-19 02:57:25,415 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 71 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:30,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:57:30,726 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2022-03-19 02:57:30,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-19 02:57:30,726 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 71 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-03-19 02:57:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:57:30,726 INFO L225 Difference]: With dead ends: 156 [2022-03-19 02:57:30,727 INFO L226 Difference]: Without dead ends: 149 [2022-03-19 02:57:30,728 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4187 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1364, Invalid=21892, Unknown=0, NotChecked=0, Total=23256 [2022-03-19 02:57:30,728 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 141 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 9501 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 9640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 9501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:57:30,728 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 223 Invalid, 9640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 9501 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-19 02:57:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-19 02:57:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-03-19 02:57:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-03-19 02:57:30,742 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 145 [2022-03-19 02:57:30,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:57:30,742 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-03-19 02:57:30,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 71 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:30,742 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-03-19 02:57:30,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-19 02:57:30,744 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:57:30,744 INFO L500 BasicCegarLoop]: trace histogram [68, 66, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:57:30,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-19 02:57:30,947 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,SelfDestructingSolverStorable67 [2022-03-19 02:57:30,947 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:57:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:57:30,948 INFO L85 PathProgramCache]: Analyzing trace with hash -688531853, now seen corresponding path program 66 times [2022-03-19 02:57:30,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:30,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1021156478] [2022-03-19 02:57:30,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:31,009 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:31,009 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:57:31,009 INFO L85 PathProgramCache]: Analyzing trace with hash 679275695, now seen corresponding path program 1 times [2022-03-19 02:57:31,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:57:31,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168030742] [2022-03-19 02:57:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:31,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:57:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:31,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:57:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:31,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:57:31,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168030742] [2022-03-19 02:57:31,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168030742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:57:31,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186879127] [2022-03-19 02:57:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:31,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:57:31,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:57:31,074 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:57:31,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-19 02:57:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:57:31,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:57:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:31,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:57:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:31,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186879127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:57:31,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:57:31,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-19 02:57:34,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:57:34,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1021156478] [2022-03-19 02:57:34,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1021156478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:57:34,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:57:34,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-19 02:57:34,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533162682] [2022-03-19 02:57:34,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:57:34,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-19 02:57:34,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:34,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-19 02:57:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=6783, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 02:57:34,028 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 72 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:57:39,485 INFO L93 Difference]: Finished difference Result 158 states and 163 transitions. [2022-03-19 02:57:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-19 02:57:39,486 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 72 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-03-19 02:57:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:57:39,486 INFO L225 Difference]: With dead ends: 158 [2022-03-19 02:57:39,486 INFO L226 Difference]: Without dead ends: 151 [2022-03-19 02:57:39,487 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4423 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1523, Invalid=22657, Unknown=0, NotChecked=0, Total=24180 [2022-03-19 02:57:39,488 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 143 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 9541 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 9682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 9541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:57:39,488 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 118 Invalid, 9682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 9541 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-19 02:57:39,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-19 02:57:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-19 02:57:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 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) [2022-03-19 02:57:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-03-19 02:57:39,502 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 147 [2022-03-19 02:57:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:57:39,502 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-03-19 02:57:39,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 72 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-03-19 02:57:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 02:57:39,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:57:39,503 INFO L500 BasicCegarLoop]: trace histogram [69, 67, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:57:39,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-19 02:57:39,719 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,SelfDestructingSolverStorable68 [2022-03-19 02:57:39,719 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:57:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:57:39,720 INFO L85 PathProgramCache]: Analyzing trace with hash -17714290, now seen corresponding path program 67 times [2022-03-19 02:57:39,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:39,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1012961876] [2022-03-19 02:57:39,737 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:39,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:39,770 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:57:39,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1566159441, now seen corresponding path program 1 times [2022-03-19 02:57:39,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:57:39,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648581331] [2022-03-19 02:57:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:39,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:57:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:39,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:57:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:39,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:57:39,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648581331] [2022-03-19 02:57:39,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648581331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:57:39,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989776278] [2022-03-19 02:57:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:39,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:57:39,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:57:39,835 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:57:39,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-19 02:57:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:39,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:57:39,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:57:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:39,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:57:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:40,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989776278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:57:40,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:57:40,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:57:42,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:57:42,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1012961876] [2022-03-19 02:57:42,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1012961876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:57:42,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:57:42,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-19 02:57:42,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489982205] [2022-03-19 02:57:42,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:57:42,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-19 02:57:42,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:42,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-19 02:57:42,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=6848, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 02:57:42,740 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 75 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 73 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:57:48,205 INFO L93 Difference]: Finished difference Result 160 states and 165 transitions. [2022-03-19 02:57:48,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 02:57:48,205 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 73 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-03-19 02:57:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:57:48,206 INFO L225 Difference]: With dead ends: 160 [2022-03-19 02:57:48,206 INFO L226 Difference]: Without dead ends: 153 [2022-03-19 02:57:48,207 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4378 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1402, Invalid=23090, Unknown=0, NotChecked=0, Total=24492 [2022-03-19 02:57:48,208 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 145 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9521 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 9664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 9521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:57:48,208 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 43 Invalid, 9664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 9521 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-19 02:57:48,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-19 02:57:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-19 02:57:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2022-03-19 02:57:48,220 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 149 [2022-03-19 02:57:48,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:57:48,220 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2022-03-19 02:57:48,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 73 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2022-03-19 02:57:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 02:57:48,221 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:57:48,221 INFO L500 BasicCegarLoop]: trace histogram [70, 68, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:57:48,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-19 02:57:48,446 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,SelfDestructingSolverStorable69 [2022-03-19 02:57:48,446 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:57:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:57:48,446 INFO L85 PathProgramCache]: Analyzing trace with hash 392869353, now seen corresponding path program 68 times [2022-03-19 02:57:48,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:48,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1273811392] [2022-03-19 02:57:48,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:48,503 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:48,503 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:57:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash 483372719, now seen corresponding path program 1 times [2022-03-19 02:57:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:57:48,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48089680] [2022-03-19 02:57:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:48,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:57:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:48,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:57:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:48,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:57:48,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48089680] [2022-03-19 02:57:48,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48089680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:57:48,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871377852] [2022-03-19 02:57:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:48,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:57:48,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:57:48,564 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:57:48,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-19 02:57:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:48,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:57:48,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:57:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:48,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:57:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:48,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871377852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:57:48,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:57:48,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:57:51,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:57:51,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1273811392] [2022-03-19 02:57:51,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1273811392] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:57:51,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:57:51,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-19 02:57:51,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147471939] [2022-03-19 02:57:51,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:57:51,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-19 02:57:51,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:51,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-19 02:57:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=7014, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 02:57:51,505 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 74 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:57:57,241 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2022-03-19 02:57:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-19 02:57:57,241 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.96) internal successors, (147), 74 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-03-19 02:57:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:57:57,242 INFO L225 Difference]: With dead ends: 162 [2022-03-19 02:57:57,242 INFO L226 Difference]: Without dead ends: 155 [2022-03-19 02:57:57,243 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4475 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1421, Invalid=23701, Unknown=0, NotChecked=0, Total=25122 [2022-03-19 02:57:57,243 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 147 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 10117 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 10262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 10117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:57:57,243 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 188 Invalid, 10262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 10117 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-19 02:57:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-19 02:57:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-19 02:57:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-03-19 02:57:57,253 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 151 [2022-03-19 02:57:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:57:57,253 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-03-19 02:57:57,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.96) internal successors, (147), 74 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:57:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-03-19 02:57:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 02:57:57,253 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:57:57,253 INFO L500 BasicCegarLoop]: trace histogram [71, 69, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:57:57,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-19 02:57:57,454 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,SelfDestructingSolverStorable70 [2022-03-19 02:57:57,454 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:57:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:57:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash -173240956, now seen corresponding path program 69 times [2022-03-19 02:57:57,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:57:57,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1200482383] [2022-03-19 02:57:57,472 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:57,516 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:57:57,516 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:57:57,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1762062417, now seen corresponding path program 1 times [2022-03-19 02:57:57,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:57:57,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757377152] [2022-03-19 02:57:57,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:57,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:57:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:57,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:57:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:57,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:57:57,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757377152] [2022-03-19 02:57:57,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757377152] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:57:57,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944390343] [2022-03-19 02:57:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:57:57,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:57:57,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:57:57,580 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:57:57,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-19 02:57:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:57:57,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:57:57,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:57:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:57,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:57:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:57:57,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944390343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:57:57,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:57:57,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:58:00,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:58:00,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1200482383] [2022-03-19 02:58:00,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1200482383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:58:00,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:58:00,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-19 02:58:00,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721318243] [2022-03-19 02:58:00,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:58:00,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-19 02:58:00,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:00,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-19 02:58:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=7182, Unknown=0, NotChecked=0, Total=7832 [2022-03-19 02:58:00,588 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 77 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 75 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:06,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:58:06,531 INFO L93 Difference]: Finished difference Result 164 states and 169 transitions. [2022-03-19 02:58:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 02:58:06,532 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 75 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-03-19 02:58:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:58:06,532 INFO L225 Difference]: With dead ends: 164 [2022-03-19 02:58:06,532 INFO L226 Difference]: Without dead ends: 157 [2022-03-19 02:58:06,533 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4573 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1440, Invalid=24320, Unknown=0, NotChecked=0, Total=25760 [2022-03-19 02:58:06,534 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 149 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 10620 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 10767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 10620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:58:06,534 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 228 Invalid, 10767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 10620 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-19 02:58:06,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-19 02:58:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-03-19 02:58:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 152 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) [2022-03-19 02:58:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-03-19 02:58:06,543 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 153 [2022-03-19 02:58:06,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:58:06,543 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-03-19 02:58:06,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 75 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-03-19 02:58:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-19 02:58:06,544 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:58:06,544 INFO L500 BasicCegarLoop]: trace histogram [72, 70, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:58:06,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-19 02:58:06,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:58:06,745 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:58:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:58:06,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1255598687, now seen corresponding path program 70 times [2022-03-19 02:58:06,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:06,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831331458] [2022-03-19 02:58:06,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:06,812 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:06,813 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:58:06,813 INFO L85 PathProgramCache]: Analyzing trace with hash 287469743, now seen corresponding path program 1 times [2022-03-19 02:58:06,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:58:06,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520723070] [2022-03-19 02:58:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:06,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:58:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:06,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:58:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:06,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:58:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520723070] [2022-03-19 02:58:06,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520723070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:58:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795109309] [2022-03-19 02:58:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:06,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:58:06,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:58:06,884 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:58:06,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-19 02:58:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:06,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:58:06,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:58:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:07,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:58:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:07,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795109309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:58:07,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:58:07,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:58:09,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:58:09,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831331458] [2022-03-19 02:58:09,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831331458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:58:09,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:58:09,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-19 02:58:09,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246774025] [2022-03-19 02:58:09,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:58:09,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-19 02:58:09,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-19 02:58:09,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=7352, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 02:58:09,930 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 78 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:15,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:58:15,945 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2022-03-19 02:58:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-19 02:58:15,945 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-19 02:58:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:58:15,946 INFO L225 Difference]: With dead ends: 166 [2022-03-19 02:58:15,946 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 02:58:15,947 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4672 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1459, Invalid=24947, Unknown=0, NotChecked=0, Total=26406 [2022-03-19 02:58:15,947 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 151 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 10628 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 10777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 10628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:58:15,947 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 163 Invalid, 10777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 10628 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-19 02:58:15,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 02:58:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-03-19 02:58:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.025974025974026) internal successors, (158), 154 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2022-03-19 02:58:15,957 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 155 [2022-03-19 02:58:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:58:15,957 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2022-03-19 02:58:15,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2022-03-19 02:58:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-19 02:58:15,958 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:58:15,958 INFO L500 BasicCegarLoop]: trace histogram [73, 71, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:58:15,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-19 02:58:16,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:58:16,162 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:58:16,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:58:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash -19039110, now seen corresponding path program 71 times [2022-03-19 02:58:16,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:16,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567603452] [2022-03-19 02:58:16,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:16,229 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:16,230 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:58:16,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1957965393, now seen corresponding path program 1 times [2022-03-19 02:58:16,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:58:16,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160966835] [2022-03-19 02:58:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:16,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:58:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:16,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:58:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:16,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:58:16,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160966835] [2022-03-19 02:58:16,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160966835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:58:16,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077699748] [2022-03-19 02:58:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:16,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:58:16,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:58:16,314 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:58:16,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-19 02:58:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:58:16,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:58:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:16,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:58:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:16,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077699748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:58:16,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:58:16,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-19 02:58:19,518 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:58:19,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1567603452] [2022-03-19 02:58:19,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1567603452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:58:19,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:58:19,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-19 02:58:19,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730968201] [2022-03-19 02:58:19,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:58:19,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-19 02:58:19,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:19,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-19 02:58:19,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=7429, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 02:58:19,519 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 79 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 77 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:58:25,846 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2022-03-19 02:58:25,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-19 02:58:25,846 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 77 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-03-19 02:58:25,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:58:25,847 INFO L225 Difference]: With dead ends: 168 [2022-03-19 02:58:25,847 INFO L226 Difference]: Without dead ends: 161 [2022-03-19 02:58:25,848 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4615 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1319, Invalid=25413, Unknown=0, NotChecked=0, Total=26732 [2022-03-19 02:58:25,848 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 11407 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 11558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 11407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:58:25,849 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 323 Invalid, 11558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 11407 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-19 02:58:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-19 02:58:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-03-19 02:58:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2022-03-19 02:58:25,863 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 157 [2022-03-19 02:58:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:58:25,864 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2022-03-19 02:58:25,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 77 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2022-03-19 02:58:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-19 02:58:25,864 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:58:25,865 INFO L500 BasicCegarLoop]: trace histogram [74, 72, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:58:25,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-19 02:58:26,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:58:26,078 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:58:26,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:58:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash -880282667, now seen corresponding path program 72 times [2022-03-19 02:58:26,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:26,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1790350955] [2022-03-19 02:58:26,096 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:26,143 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:26,143 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:58:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash 91566767, now seen corresponding path program 1 times [2022-03-19 02:58:26,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:58:26,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2707430] [2022-03-19 02:58:26,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:26,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:58:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:26,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:58:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:26,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:58:26,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2707430] [2022-03-19 02:58:26,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2707430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:58:26,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735332887] [2022-03-19 02:58:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:26,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:58:26,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:58:26,203 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:58:26,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-19 02:58:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:26,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:58:26,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:58:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:26,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:58:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:26,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735332887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:58:26,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:58:26,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:58:29,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:58:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1790350955] [2022-03-19 02:58:29,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1790350955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:58:29,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:58:29,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-19 02:58:29,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519920497] [2022-03-19 02:58:29,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:58:29,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-19 02:58:29,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-19 02:58:29,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=7698, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 02:58:29,399 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 80 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 78 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:58:35,741 INFO L93 Difference]: Finished difference Result 170 states and 175 transitions. [2022-03-19 02:58:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-19 02:58:35,741 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 78 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-03-19 02:58:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:58:35,742 INFO L225 Difference]: With dead ends: 170 [2022-03-19 02:58:35,742 INFO L226 Difference]: Without dead ends: 163 [2022-03-19 02:58:35,743 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4873 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1497, Invalid=26225, Unknown=0, NotChecked=0, Total=27722 [2022-03-19 02:58:35,743 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 155 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 11331 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 11484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 11331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:58:35,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 218 Invalid, 11484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 11331 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-19 02:58:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-19 02:58:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-03-19 02:58:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 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) [2022-03-19 02:58:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-03-19 02:58:35,759 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 159 [2022-03-19 02:58:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:58:35,759 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-03-19 02:58:35,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 78 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-03-19 02:58:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-19 02:58:35,760 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:58:35,760 INFO L500 BasicCegarLoop]: trace histogram [75, 73, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:58:35,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-19 02:58:35,983 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,SelfDestructingSolverStorable74 [2022-03-19 02:58:35,983 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:58:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:58:35,984 INFO L85 PathProgramCache]: Analyzing trace with hash 393347184, now seen corresponding path program 73 times [2022-03-19 02:58:35,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:35,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [685356451] [2022-03-19 02:58:36,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:36,053 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:36,053 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:58:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2141098927, now seen corresponding path program 1 times [2022-03-19 02:58:36,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:58:36,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200881734] [2022-03-19 02:58:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:36,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:58:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:36,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:58:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:36,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:58:36,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200881734] [2022-03-19 02:58:36,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200881734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:58:36,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802683824] [2022-03-19 02:58:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:36,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:58:36,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:58:36,120 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:58:36,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-19 02:58:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:36,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:58:36,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:58:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:36,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:58:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:36,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802683824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:58:36,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:58:36,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-19 02:58:39,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:58:39,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [685356451] [2022-03-19 02:58:39,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [685356451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:58:39,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:58:39,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-19 02:58:39,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123381062] [2022-03-19 02:58:39,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:58:39,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-19 02:58:39,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:39,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-19 02:58:39,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=7777, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 02:58:39,358 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 81 states, 80 states have (on average 1.9625) internal successors, (157), 79 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:58:45,927 INFO L93 Difference]: Finished difference Result 172 states and 177 transitions. [2022-03-19 02:58:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-19 02:58:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 1.9625) internal successors, (157), 79 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-03-19 02:58:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:58:45,928 INFO L225 Difference]: With dead ends: 172 [2022-03-19 02:58:45,928 INFO L226 Difference]: Without dead ends: 165 [2022-03-19 02:58:45,929 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4814 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1353, Invalid=26703, Unknown=0, NotChecked=0, Total=28056 [2022-03-19 02:58:45,929 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 157 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 11814 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 11969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 11814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:58:45,930 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 238 Invalid, 11969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 11814 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-19 02:58:45,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-19 02:58:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-03-19 02:58:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:45,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-03-19 02:58:45,940 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 161 [2022-03-19 02:58:45,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:58:45,940 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-03-19 02:58:45,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 1.9625) internal successors, (157), 79 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:45,940 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-03-19 02:58:45,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 02:58:45,941 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:58:45,941 INFO L500 BasicCegarLoop]: trace histogram [76, 74, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:58:45,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-19 02:58:46,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:58:46,154 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:58:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:58:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash 285954635, now seen corresponding path program 74 times [2022-03-19 02:58:46,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:46,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2095829493] [2022-03-19 02:58:46,177 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:46,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:46,210 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:58:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash -104336209, now seen corresponding path program 1 times [2022-03-19 02:58:46,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:58:46,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718568372] [2022-03-19 02:58:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:46,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:58:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:46,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:58:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:46,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:58:46,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718568372] [2022-03-19 02:58:46,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718568372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:58:46,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862907258] [2022-03-19 02:58:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:46,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:58:46,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:58:46,277 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:58:46,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-19 02:58:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:46,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:58:46,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:58:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:46,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:58:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:46,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862907258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:58:46,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:58:46,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:58:49,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:58:49,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2095829493] [2022-03-19 02:58:49,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2095829493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:58:49,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:58:49,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-19 02:58:49,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569730127] [2022-03-19 02:58:49,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:58:49,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-19 02:58:49,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-19 02:58:49,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=8052, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 02:58:49,629 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 82 states, 81 states have (on average 1.962962962962963) internal successors, (159), 80 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:58:56,445 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2022-03-19 02:58:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-19 02:58:56,446 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.962962962962963) internal successors, (159), 80 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-03-19 02:58:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:58:56,446 INFO L225 Difference]: With dead ends: 174 [2022-03-19 02:58:56,446 INFO L226 Difference]: Without dead ends: 167 [2022-03-19 02:58:56,448 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5078 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1535, Invalid=27535, Unknown=0, NotChecked=0, Total=29070 [2022-03-19 02:58:56,448 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 159 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 12403 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 12560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 12403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:58:56,448 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 368 Invalid, 12560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 12403 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-19 02:58:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-19 02:58:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-03-19 02:58:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 162 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2022-03-19 02:58:56,459 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 163 [2022-03-19 02:58:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:58:56,459 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2022-03-19 02:58:56,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 1.962962962962963) internal successors, (159), 80 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:58:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2022-03-19 02:58:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-19 02:58:56,460 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:58:56,460 INFO L500 BasicCegarLoop]: trace histogram [77, 75, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:58:56,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-19 02:58:56,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:58:56,671 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:58:56,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:58:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash 160930150, now seen corresponding path program 75 times [2022-03-19 02:58:56,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:58:56,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637062483] [2022-03-19 02:58:56,688 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:56,732 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:58:56,733 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:58:56,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1945195951, now seen corresponding path program 1 times [2022-03-19 02:58:56,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:58:56,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265290086] [2022-03-19 02:58:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:58:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:56,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:58:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:56,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:58:56,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265290086] [2022-03-19 02:58:56,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265290086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:58:56,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128748671] [2022-03-19 02:58:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:58:56,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:58:56,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:58:56,805 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:58:56,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-19 02:58:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:58:56,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:58:56,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:58:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:56,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:58:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:58:57,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128748671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:58:57,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:58:57,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:59:00,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:59:00,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637062483] [2022-03-19 02:59:00,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637062483] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:59:00,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:59:00,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-19 02:59:00,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789657896] [2022-03-19 02:59:00,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:59:00,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-19 02:59:00,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:59:00,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-19 02:59:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=8232, Unknown=0, NotChecked=0, Total=8930 [2022-03-19 02:59:00,260 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 83 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 81 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:59:07,154 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2022-03-19 02:59:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-19 02:59:07,155 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 81 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-03-19 02:59:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:59:07,155 INFO L225 Difference]: With dead ends: 176 [2022-03-19 02:59:07,155 INFO L226 Difference]: Without dead ends: 169 [2022-03-19 02:59:07,157 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1554, Invalid=28202, Unknown=0, NotChecked=0, Total=29756 [2022-03-19 02:59:07,157 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 161 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 12476 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 12635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 12476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-19 02:59:07,157 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 328 Invalid, 12635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 12476 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-19 02:59:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-19 02:59:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-03-19 02:59:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 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) [2022-03-19 02:59:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2022-03-19 02:59:07,173 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 165 [2022-03-19 02:59:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:59:07,173 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2022-03-19 02:59:07,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 81 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2022-03-19 02:59:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-19 02:59:07,174 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:59:07,174 INFO L500 BasicCegarLoop]: trace histogram [78, 76, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:59:07,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-19 02:59:07,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-19 02:59:07,375 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:59:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:59:07,376 INFO L85 PathProgramCache]: Analyzing trace with hash 271484353, now seen corresponding path program 76 times [2022-03-19 02:59:07,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:59:07,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1478444669] [2022-03-19 02:59:07,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:59:07,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:59:07,437 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:59:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash -300239185, now seen corresponding path program 1 times [2022-03-19 02:59:07,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:59:07,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464291419] [2022-03-19 02:59:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:59:07,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:59:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:07,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:59:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:07,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:59:07,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464291419] [2022-03-19 02:59:07,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464291419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:59:07,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340740798] [2022-03-19 02:59:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:59:07,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:59:07,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:59:07,506 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:59:07,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-19 02:59:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:07,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:59:07,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:59:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:07,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:59:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:07,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340740798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:59:07,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:59:07,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-19 02:59:11,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:59:11,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1478444669] [2022-03-19 02:59:11,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1478444669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:59:11,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:59:11,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-19 02:59:11,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112230283] [2022-03-19 02:59:11,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:59:11,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-19 02:59:11,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:59:11,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-19 02:59:11,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=8523, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 02:59:11,099 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 82 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:59:18,242 INFO L93 Difference]: Finished difference Result 178 states and 183 transitions. [2022-03-19 02:59:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-19 02:59:18,242 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 82 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-03-19 02:59:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:59:18,243 INFO L225 Difference]: With dead ends: 178 [2022-03-19 02:59:18,243 INFO L226 Difference]: Without dead ends: 171 [2022-03-19 02:59:18,245 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5448 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1733, Invalid=29067, Unknown=0, NotChecked=0, Total=30800 [2022-03-19 02:59:18,245 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 163 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 12955 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 13116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 12955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:59:18,245 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 338 Invalid, 13116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 12955 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-19 02:59:18,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-19 02:59:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-03-19 02:59:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 166 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2022-03-19 02:59:18,261 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 167 [2022-03-19 02:59:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:59:18,261 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2022-03-19 02:59:18,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 82 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2022-03-19 02:59:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-19 02:59:18,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:59:18,262 INFO L500 BasicCegarLoop]: trace histogram [79, 77, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:59:18,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-19 02:59:18,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-19 02:59:18,471 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:59:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:59:18,472 INFO L85 PathProgramCache]: Analyzing trace with hash -860108964, now seen corresponding path program 77 times [2022-03-19 02:59:18,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:59:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1114965603] [2022-03-19 02:59:18,494 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:59:18,528 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:59:18,528 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:59:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1749292975, now seen corresponding path program 1 times [2022-03-19 02:59:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:59:18,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271418782] [2022-03-19 02:59:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:59:18,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:59:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:18,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:59:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:59:18,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271418782] [2022-03-19 02:59:18,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271418782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:59:18,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488959554] [2022-03-19 02:59:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:59:18,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:59:18,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:59:18,608 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:59:18,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-19 02:59:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:18,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:59:18,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:59:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:18,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:59:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:18,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488959554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:59:18,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:59:18,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:59:22,143 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:59:22,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1114965603] [2022-03-19 02:59:22,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1114965603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:59:22,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:59:22,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-19 02:59:22,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546124513] [2022-03-19 02:59:22,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:59:22,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-19 02:59:22,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:59:22,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-19 02:59:22,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=8598, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 02:59:22,145 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 83 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:59:29,685 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2022-03-19 02:59:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-19 02:59:29,685 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 83 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-03-19 02:59:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:59:29,686 INFO L225 Difference]: With dead ends: 180 [2022-03-19 02:59:29,686 INFO L226 Difference]: Without dead ends: 173 [2022-03-19 02:59:29,687 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5393 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1592, Invalid=29560, Unknown=0, NotChecked=0, Total=31152 [2022-03-19 02:59:29,687 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 165 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 13109 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 13272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 13109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:59:29,687 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 333 Invalid, 13272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 13109 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-19 02:59:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-19 02:59:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-19 02:59:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0238095238095237) internal successors, (172), 168 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2022-03-19 02:59:29,698 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 169 [2022-03-19 02:59:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:59:29,698 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2022-03-19 02:59:29,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 83 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2022-03-19 02:59:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-19 02:59:29,699 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:59:29,699 INFO L500 BasicCegarLoop]: trace histogram [80, 78, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:59:29,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-19 02:59:29,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:59:29,915 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:59:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:59:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1694560713, now seen corresponding path program 78 times [2022-03-19 02:59:29,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:59:29,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684846947] [2022-03-19 02:59:29,933 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:59:29,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:59:29,967 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:59:29,967 INFO L85 PathProgramCache]: Analyzing trace with hash -496142161, now seen corresponding path program 1 times [2022-03-19 02:59:29,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:59:29,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888552273] [2022-03-19 02:59:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:59:29,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:59:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:30,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:59:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:30,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:59:30,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888552273] [2022-03-19 02:59:30,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888552273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:59:30,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858323078] [2022-03-19 02:59:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:59:30,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:59:30,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:59:30,040 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:59:30,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-19 02:59:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:30,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:59:30,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:59:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:30,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:59:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:30,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858323078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:59:30,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:59:30,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-19 02:59:33,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:59:33,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684846947] [2022-03-19 02:59:33,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684846947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:59:33,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:59:33,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-19 02:59:33,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597725466] [2022-03-19 02:59:33,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:59:33,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-19 02:59:33,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:59:33,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-19 02:59:33,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=8682, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 02:59:33,635 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 86 states, 85 states have (on average 1.964705882352941) internal successors, (167), 84 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:59:41,146 INFO L93 Difference]: Finished difference Result 182 states and 187 transitions. [2022-03-19 02:59:41,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-19 02:59:41,146 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.964705882352941) internal successors, (167), 84 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-03-19 02:59:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:59:41,147 INFO L225 Difference]: With dead ends: 182 [2022-03-19 02:59:41,147 INFO L226 Difference]: Without dead ends: 175 [2022-03-19 02:59:41,148 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5329 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1438, Invalid=30068, Unknown=0, NotChecked=0, Total=31506 [2022-03-19 02:59:41,148 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 167 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 13688 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 13853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 13688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:59:41,148 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 383 Invalid, 13853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 13688 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-19 02:59:41,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-19 02:59:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-03-19 02:59:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 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) [2022-03-19 02:59:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-03-19 02:59:41,164 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 171 [2022-03-19 02:59:41,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:59:41,165 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-03-19 02:59:41,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.964705882352941) internal successors, (167), 84 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:41,165 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-03-19 02:59:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-19 02:59:41,166 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:59:41,166 INFO L500 BasicCegarLoop]: trace histogram [81, 79, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:59:41,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-19 02:59:41,389 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:59:41,389 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:59:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:59:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash -443807150, now seen corresponding path program 79 times [2022-03-19 02:59:41,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:59:41,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1450854605] [2022-03-19 02:59:41,419 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:59:41,462 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:59:41,462 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:59:41,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1553389999, now seen corresponding path program 1 times [2022-03-19 02:59:41,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:59:41,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113020152] [2022-03-19 02:59:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:59:41,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:59:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:41,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:59:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:41,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:59:41,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113020152] [2022-03-19 02:59:41,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113020152] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:59:41,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958429762] [2022-03-19 02:59:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:59:41,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:59:41,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:59:41,518 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:59:41,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-19 02:59:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:41,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:59:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:59:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:41,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:59:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:41,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958429762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:59:41,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:59:41,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:59:45,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:59:45,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1450854605] [2022-03-19 02:59:45,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1450854605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:59:45,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:59:45,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-19 02:59:45,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309658626] [2022-03-19 02:59:45,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:59:45,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-19 02:59:45,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:59:45,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-19 02:59:45,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=8972, Unknown=0, NotChecked=0, Total=9702 [2022-03-19 02:59:45,159 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 87 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 85 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:59:52,574 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2022-03-19 02:59:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-19 02:59:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 85 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-19 02:59:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:59:52,575 INFO L225 Difference]: With dead ends: 184 [2022-03-19 02:59:52,575 INFO L226 Difference]: Without dead ends: 177 [2022-03-19 02:59:52,576 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1630, Invalid=30950, Unknown=0, NotChecked=0, Total=32580 [2022-03-19 02:59:52,577 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 169 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 13197 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 13364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 13197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:59:52,577 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 83 Invalid, 13364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 13197 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-19 02:59:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-19 02:59:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-03-19 02:59:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2022-03-19 02:59:52,588 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 173 [2022-03-19 02:59:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:59:52,588 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2022-03-19 02:59:52,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 85 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:59:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2022-03-19 02:59:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-19 02:59:52,589 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:59:52,589 INFO L500 BasicCegarLoop]: trace histogram [82, 80, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:59:52,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-19 02:59:52,811 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,SelfDestructingSolverStorable81 [2022-03-19 02:59:52,812 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:59:52,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:59:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1060475987, now seen corresponding path program 80 times [2022-03-19 02:59:52,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:59:52,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1402359674] [2022-03-19 02:59:52,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:59:52,874 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 02:59:52,874 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 02:59:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash -692045137, now seen corresponding path program 1 times [2022-03-19 02:59:52,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:59:52,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089844058] [2022-03-19 02:59:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:59:52,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:59:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:52,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:59:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:52,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:59:52,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089844058] [2022-03-19 02:59:52,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089844058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:59:52,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373525679] [2022-03-19 02:59:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:59:52,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:59:52,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:59:52,933 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 02:59:52,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-19 02:59:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:59:52,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 02:59:52,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:59:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:53,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:59:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:59:53,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373525679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:59:53,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:59:53,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 02:59:56,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:59:56,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1402359674] [2022-03-19 02:59:56,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1402359674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:59:56,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:59:56,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-19 02:59:56,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685458523] [2022-03-19 02:59:56,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:59:56,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-19 02:59:56,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:59:56,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-19 02:59:56,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=9162, Unknown=0, NotChecked=0, Total=9900 [2022-03-19 02:59:56,673 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 86 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:00:04,318 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2022-03-19 03:00:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-19 03:00:04,318 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 86 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-03-19 03:00:04,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:00:04,319 INFO L225 Difference]: With dead ends: 186 [2022-03-19 03:00:04,319 INFO L226 Difference]: Without dead ends: 179 [2022-03-19 03:00:04,320 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5717 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1649, Invalid=31657, Unknown=0, NotChecked=0, Total=33306 [2022-03-19 03:00:04,320 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 171 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 13643 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 13812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 13643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:00:04,321 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 138 Invalid, 13812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 13643 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-19 03:00:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-19 03:00:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-03-19 03:00:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2022-03-19 03:00:04,331 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 175 [2022-03-19 03:00:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:00:04,331 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2022-03-19 03:00:04,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 86 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2022-03-19 03:00:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-19 03:00:04,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:00:04,332 INFO L500 BasicCegarLoop]: trace histogram [83, 81, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:00:04,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-19 03:00:04,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:00:04,533 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:00:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:00:04,533 INFO L85 PathProgramCache]: Analyzing trace with hash -973741496, now seen corresponding path program 81 times [2022-03-19 03:00:04,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:00:04,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [727547393] [2022-03-19 03:00:04,555 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:00:04,589 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:00:04,589 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:00:04,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1357487023, now seen corresponding path program 1 times [2022-03-19 03:00:04,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:00:04,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199412982] [2022-03-19 03:00:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:00:04,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:00:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:04,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:00:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:04,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:00:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199412982] [2022-03-19 03:00:04,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199412982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:00:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279835828] [2022-03-19 03:00:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:00:04,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:00:04,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:00:04,654 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:00:04,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-19 03:00:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:04,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:00:04,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:00:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:04,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:00:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:04,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279835828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:00:04,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:00:04,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:00:08,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:00:08,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [727547393] [2022-03-19 03:00:08,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [727547393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:00:08,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:00:08,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-19 03:00:08,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492136363] [2022-03-19 03:00:08,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:00:08,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-19 03:00:08,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:00:08,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-19 03:00:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=9354, Unknown=0, NotChecked=0, Total=10100 [2022-03-19 03:00:08,475 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand has 89 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 87 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:00:16,508 INFO L93 Difference]: Finished difference Result 188 states and 193 transitions. [2022-03-19 03:00:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-19 03:00:16,509 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 87 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-03-19 03:00:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:00:16,509 INFO L225 Difference]: With dead ends: 188 [2022-03-19 03:00:16,509 INFO L226 Difference]: Without dead ends: 181 [2022-03-19 03:00:16,511 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5827 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1668, Invalid=32372, Unknown=0, NotChecked=0, Total=34040 [2022-03-19 03:00:16,511 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 173 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 14526 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 14697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 14526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:00:16,511 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 318 Invalid, 14697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 14526 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-03-19 03:00:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-19 03:00:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-03-19 03:00:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 176 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) [2022-03-19 03:00:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-03-19 03:00:16,522 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 177 [2022-03-19 03:00:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:00:16,522 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-03-19 03:00:16,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 87 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-03-19 03:00:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-19 03:00:16,523 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:00:16,523 INFO L500 BasicCegarLoop]: trace histogram [84, 82, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:00:16,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-19 03:00:16,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:00:16,723 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:00:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:00:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash 773725731, now seen corresponding path program 82 times [2022-03-19 03:00:16,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:00:16,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [451332947] [2022-03-19 03:00:16,741 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:00:16,785 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:00:16,786 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:00:16,786 INFO L85 PathProgramCache]: Analyzing trace with hash -887948113, now seen corresponding path program 1 times [2022-03-19 03:00:16,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:00:16,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011945274] [2022-03-19 03:00:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:00:16,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:00:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:16,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:00:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:16,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:00:16,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011945274] [2022-03-19 03:00:16,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011945274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:00:16,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499237446] [2022-03-19 03:00:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:00:16,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:00:16,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:00:16,858 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:00:16,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-19 03:00:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:16,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:00:16,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:00:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:17,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:00:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:17,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499237446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:00:17,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:00:17,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:00:20,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:00:20,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [451332947] [2022-03-19 03:00:20,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [451332947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:00:20,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:00:20,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-19 03:00:20,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230344254] [2022-03-19 03:00:20,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:00:20,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-19 03:00:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:00:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-19 03:00:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=9548, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 03:00:20,775 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 90 states, 89 states have (on average 1.9662921348314606) internal successors, (175), 88 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:00:28,791 INFO L93 Difference]: Finished difference Result 190 states and 195 transitions. [2022-03-19 03:00:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-19 03:00:28,793 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 1.9662921348314606) internal successors, (175), 88 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-03-19 03:00:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:00:28,794 INFO L225 Difference]: With dead ends: 190 [2022-03-19 03:00:28,794 INFO L226 Difference]: Without dead ends: 183 [2022-03-19 03:00:28,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5938 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1687, Invalid=33095, Unknown=0, NotChecked=0, Total=34782 [2022-03-19 03:00:28,795 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 14470 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 14643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 14470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:00:28,795 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 213 Invalid, 14643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 14470 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-03-19 03:00:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-19 03:00:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-03-19 03:00:28,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-03-19 03:00:28,806 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 179 [2022-03-19 03:00:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:00:28,807 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-03-19 03:00:28,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 1.9662921348314606) internal successors, (175), 88 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-03-19 03:00:28,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-19 03:00:28,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:00:28,808 INFO L500 BasicCegarLoop]: trace histogram [85, 83, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:00:28,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-19 03:00:29,008 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,SelfDestructingSolverStorable84 [2022-03-19 03:00:29,009 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:00:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:00:29,009 INFO L85 PathProgramCache]: Analyzing trace with hash 757518142, now seen corresponding path program 83 times [2022-03-19 03:00:29,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:00:29,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [162258833] [2022-03-19 03:00:29,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:00:29,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:00:29,059 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:00:29,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1161584047, now seen corresponding path program 1 times [2022-03-19 03:00:29,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:00:29,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497949791] [2022-03-19 03:00:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:00:29,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:00:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:29,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:00:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:29,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:00:29,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497949791] [2022-03-19 03:00:29,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497949791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:00:29,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703124577] [2022-03-19 03:00:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:00:29,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:00:29,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:00:29,142 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:00:29,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-19 03:00:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:29,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:00:29,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:00:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:29,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:00:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:29,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703124577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:00:29,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:00:29,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:00:33,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:00:33,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [162258833] [2022-03-19 03:00:33,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [162258833] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:00:33,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:00:33,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-19 03:00:33,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875375595] [2022-03-19 03:00:33,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:00:33,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-19 03:00:33,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:00:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-19 03:00:33,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=762, Invalid=9744, Unknown=0, NotChecked=0, Total=10506 [2022-03-19 03:00:33,085 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 91 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 89 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:41,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:00:41,203 INFO L93 Difference]: Finished difference Result 192 states and 197 transitions. [2022-03-19 03:00:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-19 03:00:41,204 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 89 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-03-19 03:00:41,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:00:41,204 INFO L225 Difference]: With dead ends: 192 [2022-03-19 03:00:41,204 INFO L226 Difference]: Without dead ends: 185 [2022-03-19 03:00:41,207 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6050 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1706, Invalid=33826, Unknown=0, NotChecked=0, Total=35532 [2022-03-19 03:00:41,207 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 177 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 14565 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 14740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 14565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:00:41,207 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 103 Invalid, 14740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 14565 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-03-19 03:00:41,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-19 03:00:41,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-03-19 03:00:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2022-03-19 03:00:41,222 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 181 [2022-03-19 03:00:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:00:41,222 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2022-03-19 03:00:41,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 89 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:41,222 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2022-03-19 03:00:41,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-19 03:00:41,223 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:00:41,223 INFO L500 BasicCegarLoop]: trace histogram [86, 84, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:00:41,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-19 03:00:41,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:00:41,439 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:00:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:00:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1933072999, now seen corresponding path program 84 times [2022-03-19 03:00:41,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:00:41,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [863909274] [2022-03-19 03:00:41,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:00:41,512 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:00:41,513 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:00:41,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1083851089, now seen corresponding path program 1 times [2022-03-19 03:00:41,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:00:41,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513044577] [2022-03-19 03:00:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:00:41,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:00:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:41,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:00:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:41,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:00:41,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513044577] [2022-03-19 03:00:41,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513044577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:00:41,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44210899] [2022-03-19 03:00:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:00:41,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:00:41,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:00:41,588 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:00:41,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-19 03:00:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:41,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:00:41,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:00:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:41,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:00:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:41,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44210899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:00:41,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:00:41,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:00:45,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:00:45,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [863909274] [2022-03-19 03:00:45,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [863909274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:00:45,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:00:45,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-19 03:00:45,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402216470] [2022-03-19 03:00:45,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:00:45,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-19 03:00:45,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:00:45,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-19 03:00:45,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=9942, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 03:00:45,682 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 90 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:00:54,282 INFO L93 Difference]: Finished difference Result 194 states and 199 transitions. [2022-03-19 03:00:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-19 03:00:54,282 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 90 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-03-19 03:00:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:00:54,283 INFO L225 Difference]: With dead ends: 194 [2022-03-19 03:00:54,283 INFO L226 Difference]: Without dead ends: 187 [2022-03-19 03:00:54,285 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6163 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1725, Invalid=34565, Unknown=0, NotChecked=0, Total=36290 [2022-03-19 03:00:54,285 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 179 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 15411 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 15588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 15411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-19 03:00:54,285 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 258 Invalid, 15588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 15411 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-19 03:00:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-19 03:00:54,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-03-19 03:00:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.021978021978022) internal successors, (186), 182 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) [2022-03-19 03:00:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2022-03-19 03:00:54,314 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 183 [2022-03-19 03:00:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:00:54,314 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2022-03-19 03:00:54,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 90 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:00:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2022-03-19 03:00:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-19 03:00:54,315 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:00:54,315 INFO L500 BasicCegarLoop]: trace histogram [87, 85, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:00:54,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-19 03:00:54,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:00:54,539 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:00:54,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:00:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2020847308, now seen corresponding path program 85 times [2022-03-19 03:00:54,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:00:54,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1392270024] [2022-03-19 03:00:54,565 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:00:54,612 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:00:54,612 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:00:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash 965681071, now seen corresponding path program 1 times [2022-03-19 03:00:54,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:00:54,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729091737] [2022-03-19 03:00:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:00:54,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:00:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:54,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:00:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:54,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:00:54,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729091737] [2022-03-19 03:00:54,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729091737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:00:54,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618694969] [2022-03-19 03:00:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:00:54,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:00:54,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:00:54,678 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:00:54,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-19 03:00:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:00:54,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:00:54,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:00:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:54,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:00:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:00:54,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618694969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:00:54,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:00:54,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:00:58,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:00:58,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1392270024] [2022-03-19 03:00:58,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1392270024] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:00:58,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:00:58,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-19 03:00:58,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970831478] [2022-03-19 03:00:58,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:00:58,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-19 03:00:58,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:00:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-19 03:00:58,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=778, Invalid=10142, Unknown=0, NotChecked=0, Total=10920 [2022-03-19 03:00:58,789 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 93 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 91 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:01:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:01:07,326 INFO L93 Difference]: Finished difference Result 196 states and 201 transitions. [2022-03-19 03:01:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-19 03:01:07,327 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 91 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-03-19 03:01:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:01:07,327 INFO L225 Difference]: With dead ends: 196 [2022-03-19 03:01:07,327 INFO L226 Difference]: Without dead ends: 189 [2022-03-19 03:01:07,328 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6277 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1744, Invalid=35312, Unknown=0, NotChecked=0, Total=37056 [2022-03-19 03:01:07,329 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 181 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 15427 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 15606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 15427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-19 03:01:07,329 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 183 Invalid, 15606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 15427 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-19 03:01:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-19 03:01:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-19 03:01:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0217391304347827) internal successors, (188), 184 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:01:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2022-03-19 03:01:07,340 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 185 [2022-03-19 03:01:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:01:07,340 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2022-03-19 03:01:07,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 91 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:01:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2022-03-19 03:01:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-19 03:01:07,341 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:01:07,341 INFO L500 BasicCegarLoop]: trace histogram [88, 86, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:01:07,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-19 03:01:07,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-19 03:01:07,542 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:01:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:01:07,542 INFO L85 PathProgramCache]: Analyzing trace with hash -472612337, now seen corresponding path program 86 times [2022-03-19 03:01:07,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:01:07,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1792853699] [2022-03-19 03:01:07,565 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:01:07,599 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:01:07,599 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:01:07,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1279754065, now seen corresponding path program 1 times [2022-03-19 03:01:07,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:01:07,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523494095] [2022-03-19 03:01:07,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:01:07,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:01:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:07,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:01:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:07,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:01:07,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523494095] [2022-03-19 03:01:07,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523494095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:01:07,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135469477] [2022-03-19 03:01:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:01:07,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:01:07,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:01:07,659 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:01:07,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-19 03:01:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:07,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:01:07,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:01:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:07,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:01:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:07,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135469477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:01:07,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:01:07,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:01:11,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:01:11,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1792853699] [2022-03-19 03:01:11,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1792853699] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:01:11,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:01:11,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-19 03:01:11,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264929963] [2022-03-19 03:01:11,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:01:11,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-19 03:01:11,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:01:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-19 03:01:11,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=10344, Unknown=0, NotChecked=0, Total=11130 [2022-03-19 03:01:11,834 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 92 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:01:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:01:20,574 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2022-03-19 03:01:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-19 03:01:20,574 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 92 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-03-19 03:01:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:01:20,575 INFO L225 Difference]: With dead ends: 198 [2022-03-19 03:01:20,575 INFO L226 Difference]: Without dead ends: 191 [2022-03-19 03:01:20,576 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6392 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1763, Invalid=36067, Unknown=0, NotChecked=0, Total=37830 [2022-03-19 03:01:20,577 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 183 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 15743 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 15924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 15743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:01:20,577 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 168 Invalid, 15924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 15743 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-03-19 03:01:20,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-19 03:01:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-19 03:01:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:01:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2022-03-19 03:01:20,588 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 187 [2022-03-19 03:01:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:01:20,588 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2022-03-19 03:01:20,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 92 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:01:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2022-03-19 03:01:20,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-19 03:01:20,589 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:01:20,589 INFO L500 BasicCegarLoop]: trace histogram [89, 87, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:01:20,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-19 03:01:20,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:01:20,789 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:01:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:01:20,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1322510378, now seen corresponding path program 87 times [2022-03-19 03:01:20,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:01:20,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1084406244] [2022-03-19 03:01:20,817 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:01:20,873 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:01:20,873 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:01:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash 769778095, now seen corresponding path program 1 times [2022-03-19 03:01:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:01:20,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119738370] [2022-03-19 03:01:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:01:20,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:01:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:20,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:01:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:20,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:01:20,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119738370] [2022-03-19 03:01:20,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119738370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:01:20,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196782780] [2022-03-19 03:01:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:01:20,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:01:20,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:01:20,961 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:01:20,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-19 03:01:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:20,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:01:20,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:01:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:21,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:01:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:21,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196782780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:01:21,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:01:21,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-19 03:01:25,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:01:25,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1084406244] [2022-03-19 03:01:25,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1084406244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:01:25,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:01:25,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-19 03:01:25,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167259589] [2022-03-19 03:01:25,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:01:25,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-19 03:01:25,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:01:25,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-19 03:01:25,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=888, Invalid=10668, Unknown=0, NotChecked=0, Total=11556 [2022-03-19 03:01:25,410 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand has 95 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 93 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:01:34,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:01:34,566 INFO L93 Difference]: Finished difference Result 200 states and 205 transitions. [2022-03-19 03:01:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-19 03:01:34,567 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 93 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-03-19 03:01:34,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:01:34,567 INFO L225 Difference]: With dead ends: 200 [2022-03-19 03:01:34,567 INFO L226 Difference]: Without dead ends: 193 [2022-03-19 03:01:34,578 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6691 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1964, Invalid=37042, Unknown=0, NotChecked=0, Total=39006 [2022-03-19 03:01:34,578 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 185 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 16816 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 16999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 16816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:01:34,578 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 418 Invalid, 16999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 16816 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-19 03:01:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-19 03:01:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-03-19 03:01:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 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) [2022-03-19 03:01:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2022-03-19 03:01:34,590 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 189 [2022-03-19 03:01:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:01:34,590 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2022-03-19 03:01:34,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 93 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:01:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2022-03-19 03:01:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-19 03:01:34,591 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:01:34,591 INFO L500 BasicCegarLoop]: trace histogram [90, 88, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:01:34,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-19 03:01:34,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:01:34,792 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:01:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:01:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash -141413499, now seen corresponding path program 88 times [2022-03-19 03:01:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:01:34,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [182461283] [2022-03-19 03:01:34,809 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:01:34,841 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:01:34,841 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:01:34,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1475657041, now seen corresponding path program 1 times [2022-03-19 03:01:34,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:01:34,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087947407] [2022-03-19 03:01:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:01:34,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:01:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:34,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:01:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:34,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:01:34,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087947407] [2022-03-19 03:01:34,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087947407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:01:34,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24921552] [2022-03-19 03:01:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:01:34,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:01:34,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:01:34,900 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:01:34,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-19 03:01:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:34,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:01:34,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:01:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:35,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:01:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:35,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24921552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:01:35,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:01:35,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:01:39,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:01:39,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [182461283] [2022-03-19 03:01:39,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [182461283] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:01:39,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:01:39,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-19 03:01:39,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322270937] [2022-03-19 03:01:39,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:01:39,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-19 03:01:39,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:01:39,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-19 03:01:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=802, Invalid=10754, Unknown=0, NotChecked=0, Total=11556 [2022-03-19 03:01:39,230 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 96 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 94 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:01:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:01:48,383 INFO L93 Difference]: Finished difference Result 202 states and 207 transitions. [2022-03-19 03:01:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-19 03:01:48,383 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 94 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-03-19 03:01:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:01:48,384 INFO L225 Difference]: With dead ends: 202 [2022-03-19 03:01:48,384 INFO L226 Difference]: Without dead ends: 195 [2022-03-19 03:01:48,386 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6625 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1801, Invalid=37601, Unknown=0, NotChecked=0, Total=39402 [2022-03-19 03:01:48,386 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 187 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 16541 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 16726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 16541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:01:48,386 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 208 Invalid, 16726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 16541 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-03-19 03:01:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-19 03:01:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-03-19 03:01:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 190 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:01:48,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2022-03-19 03:01:48,399 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 191 [2022-03-19 03:01:48,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:01:48,399 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2022-03-19 03:01:48,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 94 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:01:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2022-03-19 03:01:48,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-19 03:01:48,400 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:01:48,400 INFO L500 BasicCegarLoop]: trace histogram [91, 89, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:01:48,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-19 03:01:48,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:01:48,601 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:01:48,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:01:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1777013792, now seen corresponding path program 89 times [2022-03-19 03:01:48,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:01:48,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [174429474] [2022-03-19 03:01:48,625 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:01:48,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:01:48,664 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:01:48,664 INFO L85 PathProgramCache]: Analyzing trace with hash 573875119, now seen corresponding path program 1 times [2022-03-19 03:01:48,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:01:48,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394105139] [2022-03-19 03:01:48,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:01:48,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:01:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:48,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:01:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:48,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:01:48,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394105139] [2022-03-19 03:01:48,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394105139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:01:48,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688094621] [2022-03-19 03:01:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:01:48,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:01:48,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:01:48,738 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:01:48,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-19 03:01:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:01:48,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:01:48,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:01:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:48,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:01:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:01:49,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688094621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:01:49,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:01:49,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:01:53,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:01:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [174429474] [2022-03-19 03:01:53,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [174429474] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:01:53,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:01:53,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-19 03:01:53,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531782030] [2022-03-19 03:01:53,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:01:53,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-19 03:01:53,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:01:53,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-19 03:01:53,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=810, Invalid=10962, Unknown=0, NotChecked=0, Total=11772 [2022-03-19 03:01:53,138 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 97 states, 96 states have (on average 1.96875) internal successors, (189), 95 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:02:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:02:02,486 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2022-03-19 03:02:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-19 03:02:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 1.96875) internal successors, (189), 95 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-03-19 03:02:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:02:02,487 INFO L225 Difference]: With dead ends: 204 [2022-03-19 03:02:02,487 INFO L226 Difference]: Without dead ends: 197 [2022-03-19 03:02:02,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6743 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1820, Invalid=38380, Unknown=0, NotChecked=0, Total=40200 [2022-03-19 03:02:02,489 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 189 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 17144 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 17331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 17144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:02:02,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 318 Invalid, 17331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 17144 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-03-19 03:02:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-19 03:02:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-03-19 03:02:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 192 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:02:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2022-03-19 03:02:02,511 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 193 [2022-03-19 03:02:02,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:02:02,511 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2022-03-19 03:02:02,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 1.96875) internal successors, (189), 95 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:02:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2022-03-19 03:02:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-19 03:02:02,512 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:02:02,512 INFO L500 BasicCegarLoop]: trace histogram [92, 90, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:02:02,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-19 03:02:02,731 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,SelfDestructingSolverStorable91 [2022-03-19 03:02:02,731 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:02:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:02:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1450296837, now seen corresponding path program 90 times [2022-03-19 03:02:02,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:02:02,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [363855567] [2022-03-19 03:02:02,754 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:02:02,797 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:02:02,797 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:02:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1671560017, now seen corresponding path program 1 times [2022-03-19 03:02:02,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:02:02,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767416767] [2022-03-19 03:02:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:02:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:02:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:02,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:02:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:02,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:02:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767416767] [2022-03-19 03:02:02,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767416767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:02:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850256574] [2022-03-19 03:02:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:02:02,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:02:02,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:02:02,877 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:02:02,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-19 03:02:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:02,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:02:02,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:02:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:03,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:02:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:03,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850256574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:02:03,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:02:03,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-19 03:02:07,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:02:07,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [363855567] [2022-03-19 03:02:07,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [363855567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:02:07,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:02:07,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-19 03:02:07,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685335048] [2022-03-19 03:02:07,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:02:07,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-19 03:02:07,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:02:07,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-19 03:02:07,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=11295, Unknown=0, NotChecked=0, Total=12210 [2022-03-19 03:02:07,526 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand has 98 states, 97 states have (on average 1.9690721649484537) internal successors, (191), 96 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:02:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:02:17,051 INFO L93 Difference]: Finished difference Result 206 states and 211 transitions. [2022-03-19 03:02:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-19 03:02:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 1.9690721649484537) internal successors, (191), 96 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-03-19 03:02:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:02:17,052 INFO L225 Difference]: With dead ends: 206 [2022-03-19 03:02:17,052 INFO L226 Difference]: Without dead ends: 199 [2022-03-19 03:02:17,053 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7051 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2027, Invalid=39385, Unknown=0, NotChecked=0, Total=41412 [2022-03-19 03:02:17,053 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 191 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 17399 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 17588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 17399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:02:17,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 268 Invalid, 17588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 17399 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-03-19 03:02:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-19 03:02:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-03-19 03:02:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 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) [2022-03-19 03:02:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 202 transitions. [2022-03-19 03:02:17,066 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 202 transitions. Word has length 195 [2022-03-19 03:02:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:02:17,066 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 202 transitions. [2022-03-19 03:02:17,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 1.9690721649484537) internal successors, (191), 96 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:02:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 202 transitions. [2022-03-19 03:02:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-19 03:02:17,067 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:02:17,067 INFO L500 BasicCegarLoop]: trace histogram [93, 91, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:02:17,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-19 03:02:17,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:02:17,285 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:02:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:02:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1929423594, now seen corresponding path program 91 times [2022-03-19 03:02:17,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:02:17,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [404778585] [2022-03-19 03:02:17,302 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:02:17,349 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:02:17,350 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:02:17,350 INFO L85 PathProgramCache]: Analyzing trace with hash 377972143, now seen corresponding path program 1 times [2022-03-19 03:02:17,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:02:17,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160411084] [2022-03-19 03:02:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:02:17,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:02:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:17,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:02:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:17,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:02:17,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160411084] [2022-03-19 03:02:17,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160411084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:02:17,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193089921] [2022-03-19 03:02:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:02:17,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:02:17,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:02:17,404 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:02:17,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-19 03:02:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:17,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:02:17,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:02:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:17,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:02:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:17,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193089921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:02:17,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:02:17,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:02:21,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:02:21,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [404778585] [2022-03-19 03:02:21,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [404778585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:02:21,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:02:21,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-19 03:02:21,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145755531] [2022-03-19 03:02:21,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:02:21,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-19 03:02:21,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:02:21,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-19 03:02:21,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=11384, Unknown=0, NotChecked=0, Total=12210 [2022-03-19 03:02:21,938 INFO L87 Difference]: Start difference. First operand 199 states and 202 transitions. Second operand has 99 states, 98 states have (on average 1.969387755102041) internal successors, (193), 97 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:02:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:02:31,634 INFO L93 Difference]: Finished difference Result 208 states and 213 transitions. [2022-03-19 03:02:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-19 03:02:31,634 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 1.969387755102041) internal successors, (193), 97 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-03-19 03:02:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:02:31,635 INFO L225 Difference]: With dead ends: 208 [2022-03-19 03:02:31,635 INFO L226 Difference]: Without dead ends: 201 [2022-03-19 03:02:31,637 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6982 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1858, Invalid=39962, Unknown=0, NotChecked=0, Total=41820 [2022-03-19 03:02:31,637 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 193 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 17858 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 18049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 17858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:02:31,637 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 228 Invalid, 18049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 17858 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-03-19 03:02:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-19 03:02:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-03-19 03:02:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 196 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:02:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2022-03-19 03:02:31,649 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 197 [2022-03-19 03:02:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:02:31,649 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2022-03-19 03:02:31,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 1.969387755102041) internal successors, (193), 97 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:02:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2022-03-19 03:02:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-19 03:02:31,650 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:02:31,650 INFO L500 BasicCegarLoop]: trace histogram [94, 92, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:02:31,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-19 03:02:31,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:02:31,851 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:02:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:02:31,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1486230897, now seen corresponding path program 92 times [2022-03-19 03:02:31,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:02:31,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [739727611] [2022-03-19 03:02:31,873 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:02:31,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:02:31,918 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:02:31,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1867462993, now seen corresponding path program 1 times [2022-03-19 03:02:31,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:02:31,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496562924] [2022-03-19 03:02:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:02:31,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:02:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:31,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:02:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:31,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:02:31,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496562924] [2022-03-19 03:02:31,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496562924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:02:31,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629372913] [2022-03-19 03:02:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:02:31,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:02:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:02:31,979 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:02:31,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-19 03:02:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:02:32,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:02:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:32,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:02:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:32,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629372913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:02:32,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:02:32,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:02:36,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:02:36,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [739727611] [2022-03-19 03:02:36,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [739727611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:02:36,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:02:36,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-19 03:02:36,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510846920] [2022-03-19 03:02:36,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:02:36,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-19 03:02:36,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:02:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-19 03:02:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=11598, Unknown=0, NotChecked=0, Total=12432 [2022-03-19 03:02:36,576 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand has 100 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 98 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:02:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:02:46,642 INFO L93 Difference]: Finished difference Result 210 states and 215 transitions. [2022-03-19 03:02:46,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-19 03:02:46,642 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 98 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-03-19 03:02:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:02:46,643 INFO L225 Difference]: With dead ends: 210 [2022-03-19 03:02:46,643 INFO L226 Difference]: Without dead ends: 203 [2022-03-19 03:02:46,645 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7103 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1877, Invalid=40765, Unknown=0, NotChecked=0, Total=42642 [2022-03-19 03:02:46,645 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 195 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 18662 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 18855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 18662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-03-19 03:02:46,645 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 423 Invalid, 18855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 18662 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-03-19 03:02:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-19 03:02:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-03-19 03:02:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.02020202020202) internal successors, (202), 198 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:02:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2022-03-19 03:02:46,657 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 199 [2022-03-19 03:02:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:02:46,658 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2022-03-19 03:02:46,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 98 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:02:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2022-03-19 03:02:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-19 03:02:46,658 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:02:46,658 INFO L500 BasicCegarLoop]: trace histogram [95, 93, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:02:46,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-19 03:02:46,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:02:46,859 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:02:46,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:02:46,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1719784692, now seen corresponding path program 93 times [2022-03-19 03:02:46,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:02:46,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [376836286] [2022-03-19 03:02:46,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:02:46,909 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:02:46,910 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:02:46,910 INFO L85 PathProgramCache]: Analyzing trace with hash 182069167, now seen corresponding path program 1 times [2022-03-19 03:02:46,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:02:46,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909584152] [2022-03-19 03:02:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:02:46,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:02:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:46,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:02:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:46,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:02:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909584152] [2022-03-19 03:02:46,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909584152] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:02:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284118977] [2022-03-19 03:02:46,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:02:46,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:02:46,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:02:46,974 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:02:46,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-19 03:02:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:02:46,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:02:46,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:02:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:47,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:02:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:02:47,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284118977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:02:47,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:02:47,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-19 03:02:51,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:02:51,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [376836286] [2022-03-19 03:02:51,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [376836286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:02:51,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:02:51,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-19 03:02:51,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666637409] [2022-03-19 03:02:51,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:02:51,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-19 03:02:51,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:02:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-19 03:02:51,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=735, Invalid=11697, Unknown=0, NotChecked=0, Total=12432 [2022-03-19 03:02:51,644 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 101 states, 100 states have (on average 1.97) internal successors, (197), 99 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:03:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:03:01,845 INFO L93 Difference]: Finished difference Result 212 states and 217 transitions. [2022-03-19 03:03:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-19 03:03:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 1.97) internal successors, (197), 99 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-03-19 03:03:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:03:01,846 INFO L225 Difference]: With dead ends: 212 [2022-03-19 03:03:01,846 INFO L226 Difference]: Without dead ends: 205 [2022-03-19 03:03:01,848 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7024 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1693, Invalid=41363, Unknown=0, NotChecked=0, Total=43056 [2022-03-19 03:03:01,848 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 197 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 18793 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 18988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 18793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-03-19 03:03:01,848 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 393 Invalid, 18988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 18793 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-03-19 03:03:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-19 03:03:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-03-19 03:03:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.02) internal successors, (204), 200 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) [2022-03-19 03:03:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-03-19 03:03:01,860 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 201 [2022-03-19 03:03:01,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:03:01,860 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-03-19 03:03:01,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 1.97) internal successors, (197), 99 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:03:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-03-19 03:03:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-19 03:03:01,861 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:03:01,861 INFO L500 BasicCegarLoop]: trace histogram [96, 94, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:03:01,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-19 03:03:02,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:03:02,062 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:03:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:03:02,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1085752807, now seen corresponding path program 94 times [2022-03-19 03:03:02,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:03:02,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1655317626] [2022-03-19 03:03:02,080 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:03:02,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:03:02,121 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:03:02,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2063365969, now seen corresponding path program 1 times [2022-03-19 03:03:02,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:03:02,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391563508] [2022-03-19 03:03:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:03:02,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:03:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:02,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:03:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:02,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:03:02,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391563508] [2022-03-19 03:03:02,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391563508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:03:02,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76206176] [2022-03-19 03:03:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:03:02,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:03:02,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:03:02,194 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:03:02,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-19 03:03:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:02,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:03:02,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:03:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:02,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:03:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:02,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76206176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:03:02,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:03:02,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:03:06,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:03:06,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1655317626] [2022-03-19 03:03:06,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1655317626] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:03:06,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:03:06,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-19 03:03:06,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985579356] [2022-03-19 03:03:06,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:03:06,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-19 03:03:06,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:03:06,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-19 03:03:06,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=850, Invalid=12032, Unknown=0, NotChecked=0, Total=12882 [2022-03-19 03:03:06,945 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 102 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 100 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:03:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:03:17,389 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2022-03-19 03:03:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-19 03:03:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 100 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-03-19 03:03:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:03:17,390 INFO L225 Difference]: With dead ends: 214 [2022-03-19 03:03:17,390 INFO L226 Difference]: Without dead ends: 207 [2022-03-19 03:03:17,392 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7348 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1915, Invalid=42395, Unknown=0, NotChecked=0, Total=44310 [2022-03-19 03:03:17,393 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 199 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 19523 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 19720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 19523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:03:17,393 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 468 Invalid, 19720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 19523 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-03-19 03:03:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-19 03:03:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-03-19 03:03:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 202 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:03:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2022-03-19 03:03:17,406 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 203 [2022-03-19 03:03:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:03:17,406 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2022-03-19 03:03:17,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 100 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:03:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2022-03-19 03:03:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-19 03:03:17,407 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:03:17,407 INFO L500 BasicCegarLoop]: trace histogram [97, 95, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:03:17,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-19 03:03:17,607 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,SelfDestructingSolverStorable96 [2022-03-19 03:03:17,608 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:03:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:03:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash -32172542, now seen corresponding path program 95 times [2022-03-19 03:03:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:03:17,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [823600228] [2022-03-19 03:03:17,631 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:03:17,682 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:03:17,682 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:03:17,682 INFO L85 PathProgramCache]: Analyzing trace with hash -13833809, now seen corresponding path program 1 times [2022-03-19 03:03:17,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:03:17,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024430290] [2022-03-19 03:03:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:03:17,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:03:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:17,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:03:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:17,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:03:17,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024430290] [2022-03-19 03:03:17,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024430290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:03:17,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402757400] [2022-03-19 03:03:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:03:17,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:03:17,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:03:17,764 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:03:17,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-19 03:03:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:17,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:03:17,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:03:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:17,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:03:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:18,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402757400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:03:18,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:03:18,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:03:22,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:03:22,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [823600228] [2022-03-19 03:03:22,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [823600228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:03:22,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:03:22,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-19 03:03:22,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222019139] [2022-03-19 03:03:22,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:03:22,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-19 03:03:22,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:03:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-19 03:03:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=858, Invalid=12252, Unknown=0, NotChecked=0, Total=13110 [2022-03-19 03:03:22,559 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 103 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 101 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:03:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:03:33,071 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2022-03-19 03:03:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-19 03:03:33,072 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 101 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-03-19 03:03:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:03:33,072 INFO L225 Difference]: With dead ends: 216 [2022-03-19 03:03:33,072 INFO L226 Difference]: Without dead ends: 209 [2022-03-19 03:03:33,074 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7472 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1934, Invalid=43222, Unknown=0, NotChecked=0, Total=45156 [2022-03-19 03:03:33,074 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 201 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 19393 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 19592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 19393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:03:33,074 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 233 Invalid, 19592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 19393 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-03-19 03:03:33,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-19 03:03:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-19 03:03:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:03:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 212 transitions. [2022-03-19 03:03:33,087 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 212 transitions. Word has length 205 [2022-03-19 03:03:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:03:33,087 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 212 transitions. [2022-03-19 03:03:33,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 101 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:03:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 212 transitions. [2022-03-19 03:03:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-19 03:03:33,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:03:33,088 INFO L500 BasicCegarLoop]: trace histogram [98, 96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:03:33,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-19 03:03:33,288 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,SelfDestructingSolverStorable97 [2022-03-19 03:03:33,288 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:03:33,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:03:33,289 INFO L85 PathProgramCache]: Analyzing trace with hash -616608931, now seen corresponding path program 96 times [2022-03-19 03:03:33,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:03:33,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [153237666] [2022-03-19 03:03:33,312 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:03:33,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:03:33,356 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:03:33,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2035698351, now seen corresponding path program 1 times [2022-03-19 03:03:33,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:03:33,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052191472] [2022-03-19 03:03:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:03:33,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:03:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:33,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:03:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:33,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:03:33,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052191472] [2022-03-19 03:03:33,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052191472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:03:33,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643496909] [2022-03-19 03:03:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:03:33,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:03:33,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:03:33,422 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:03:33,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-19 03:03:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:33,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:03:33,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:03:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:33,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:03:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:33,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643496909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:03:33,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:03:33,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:03:38,418 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:03:38,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [153237666] [2022-03-19 03:03:38,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [153237666] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:03:38,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:03:38,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-19 03:03:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188517044] [2022-03-19 03:03:38,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:03:38,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-19 03:03:38,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:03:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-19 03:03:38,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=12474, Unknown=0, NotChecked=0, Total=13340 [2022-03-19 03:03:38,420 INFO L87 Difference]: Start difference. First operand 209 states and 212 transitions. Second operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 102 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:03:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:03:49,114 INFO L93 Difference]: Finished difference Result 218 states and 223 transitions. [2022-03-19 03:03:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-19 03:03:49,114 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 102 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-03-19 03:03:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:03:49,115 INFO L225 Difference]: With dead ends: 218 [2022-03-19 03:03:49,115 INFO L226 Difference]: Without dead ends: 211 [2022-03-19 03:03:49,116 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7597 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1953, Invalid=44057, Unknown=0, NotChecked=0, Total=46010 [2022-03-19 03:03:49,117 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 203 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 19619 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 19820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 19619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:03:49,117 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 158 Invalid, 19820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 19619 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-03-19 03:03:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-19 03:03:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-03-19 03:03:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 206 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) [2022-03-19 03:03:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2022-03-19 03:03:49,129 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 207 [2022-03-19 03:03:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:03:49,129 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2022-03-19 03:03:49,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 102 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:03:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2022-03-19 03:03:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-19 03:03:49,130 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:03:49,130 INFO L500 BasicCegarLoop]: trace histogram [99, 97, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:03:49,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-19 03:03:49,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:03:49,335 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:03:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:03:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash 380737016, now seen corresponding path program 97 times [2022-03-19 03:03:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:03:49,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2017171784] [2022-03-19 03:03:49,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:03:49,404 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:03:49,404 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:03:49,405 INFO L85 PathProgramCache]: Analyzing trace with hash -209736785, now seen corresponding path program 1 times [2022-03-19 03:03:49,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:03:49,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105804147] [2022-03-19 03:03:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:03:49,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:03:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:49,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:03:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:49,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:03:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105804147] [2022-03-19 03:03:49,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105804147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:03:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774583732] [2022-03-19 03:03:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:03:49,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:03:49,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:03:49,469 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:03:49,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-19 03:03:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:03:49,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:03:49,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:03:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:49,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:03:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:03:49,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774583732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:03:49,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:03:49,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:03:54,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:03:54,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2017171784] [2022-03-19 03:03:54,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2017171784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:03:54,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:03:54,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-19 03:03:54,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365512968] [2022-03-19 03:03:54,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:03:54,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-19 03:03:54,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:03:54,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-19 03:03:54,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=12698, Unknown=0, NotChecked=0, Total=13572 [2022-03-19 03:03:54,544 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand has 105 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 103 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:04:05,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:04:05,300 INFO L93 Difference]: Finished difference Result 220 states and 225 transitions. [2022-03-19 03:04:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-19 03:04:05,300 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 103 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-03-19 03:04:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:04:05,301 INFO L225 Difference]: With dead ends: 220 [2022-03-19 03:04:05,301 INFO L226 Difference]: Without dead ends: 213 [2022-03-19 03:04:05,302 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7723 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1972, Invalid=44900, Unknown=0, NotChecked=0, Total=46872 [2022-03-19 03:04:05,302 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 205 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 19758 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 19961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 19758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:04:05,303 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 128 Invalid, 19961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 19758 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-03-19 03:04:05,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-19 03:04:05,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-03-19 03:04:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0192307692307692) internal successors, (212), 208 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:04:05,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2022-03-19 03:04:05,316 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 209 [2022-03-19 03:04:05,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:04:05,316 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2022-03-19 03:04:05,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 103 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:04:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2022-03-19 03:04:05,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-19 03:04:05,317 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:04:05,317 INFO L500 BasicCegarLoop]: trace histogram [100, 98, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:04:05,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-19 03:04:05,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:04:05,518 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:04:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:04:05,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1052485075, now seen corresponding path program 98 times [2022-03-19 03:04:05,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:04:05,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1584656737] [2022-03-19 03:04:05,541 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:04:05,597 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:04:05,598 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:04:05,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1839795375, now seen corresponding path program 1 times [2022-03-19 03:04:05,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:04:05,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340010060] [2022-03-19 03:04:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:04:05,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:04:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:05,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:04:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:05,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:04:05,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340010060] [2022-03-19 03:04:05,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340010060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:04:05,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356104437] [2022-03-19 03:04:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:04:05,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:04:05,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:04:05,653 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:04:05,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-19 03:04:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:04:05,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:04:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:05,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:04:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:05,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356104437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:04:05,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:04:05,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:04:10,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:04:10,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1584656737] [2022-03-19 03:04:10,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1584656737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:04:10,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:04:10,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-03-19 03:04:10,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076210337] [2022-03-19 03:04:10,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:04:10,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-19 03:04:10,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:04:10,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-19 03:04:10,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=882, Invalid=12924, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 03:04:10,735 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 106 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:04:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:04:21,913 INFO L93 Difference]: Finished difference Result 222 states and 227 transitions. [2022-03-19 03:04:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-19 03:04:21,913 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-03-19 03:04:21,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:04:21,914 INFO L225 Difference]: With dead ends: 222 [2022-03-19 03:04:21,914 INFO L226 Difference]: Without dead ends: 215 [2022-03-19 03:04:21,916 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7850 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1991, Invalid=45751, Unknown=0, NotChecked=0, Total=47742 [2022-03-19 03:04:21,917 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 207 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 20694 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 20899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 20694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:04:21,917 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 373 Invalid, 20899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 20694 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-03-19 03:04:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-19 03:04:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-03-19 03:04:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.019047619047619) internal successors, (214), 210 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:04:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2022-03-19 03:04:21,930 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 211 [2022-03-19 03:04:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:04:21,930 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2022-03-19 03:04:21,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:04:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2022-03-19 03:04:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-19 03:04:21,931 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:04:21,931 INFO L500 BasicCegarLoop]: trace histogram [101, 99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:04:21,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-19 03:04:22,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-19 03:04:22,140 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:04:22,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:04:22,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1937691922, now seen corresponding path program 99 times [2022-03-19 03:04:22,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:04:22,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1729707802] [2022-03-19 03:04:22,158 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:04:22,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:04:22,202 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:04:22,203 INFO L85 PathProgramCache]: Analyzing trace with hash -405639761, now seen corresponding path program 1 times [2022-03-19 03:04:22,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:04:22,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972678363] [2022-03-19 03:04:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:04:22,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:04:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:22,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:04:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:22,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:04:22,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972678363] [2022-03-19 03:04:22,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972678363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:04:22,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686743056] [2022-03-19 03:04:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:04:22,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:04:22,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:04:22,281 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:04:22,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-19 03:04:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:04:22,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:04:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:22,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:04:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:22,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686743056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:04:22,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:04:22,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:04:27,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:04:27,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1729707802] [2022-03-19 03:04:27,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1729707802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:04:27,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:04:27,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-19 03:04:27,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36061690] [2022-03-19 03:04:27,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:04:27,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-19 03:04:27,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:04:27,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-19 03:04:27,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=890, Invalid=13152, Unknown=0, NotChecked=0, Total=14042 [2022-03-19 03:04:27,576 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 107 states, 106 states have (on average 1.971698113207547) internal successors, (209), 105 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:04:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:04:38,790 INFO L93 Difference]: Finished difference Result 224 states and 229 transitions. [2022-03-19 03:04:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-19 03:04:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 1.971698113207547) internal successors, (209), 105 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-03-19 03:04:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:04:38,792 INFO L225 Difference]: With dead ends: 224 [2022-03-19 03:04:38,792 INFO L226 Difference]: Without dead ends: 217 [2022-03-19 03:04:38,794 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7978 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=2010, Invalid=46610, Unknown=0, NotChecked=0, Total=48620 [2022-03-19 03:04:38,795 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 209 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 20490 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 20697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 20490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:04:38,795 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 98 Invalid, 20697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 20490 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-03-19 03:04:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-19 03:04:38,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-03-19 03:04:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 212 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) [2022-03-19 03:04:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 220 transitions. [2022-03-19 03:04:38,809 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 220 transitions. Word has length 213 [2022-03-19 03:04:38,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:04:38,809 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 220 transitions. [2022-03-19 03:04:38,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 1.971698113207547) internal successors, (209), 105 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:04:38,809 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 220 transitions. [2022-03-19 03:04:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-03-19 03:04:38,809 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:04:38,810 INFO L500 BasicCegarLoop]: trace histogram [102, 100, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:04:38,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-19 03:04:39,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:04:39,010 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:04:39,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:04:39,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2130302281, now seen corresponding path program 100 times [2022-03-19 03:04:39,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:04:39,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1778712652] [2022-03-19 03:04:39,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:04:39,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:04:39,078 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:04:39,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1643892399, now seen corresponding path program 1 times [2022-03-19 03:04:39,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:04:39,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694695515] [2022-03-19 03:04:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:04:39,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:04:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:39,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:04:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:39,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:04:39,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694695515] [2022-03-19 03:04:39,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694695515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:04:39,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42948280] [2022-03-19 03:04:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:04:39,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:04:39,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:04:39,163 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:04:39,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-19 03:04:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:39,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:04:39,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:04:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:39,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:04:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:39,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42948280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:04:39,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:04:39,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-19 03:04:44,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:04:44,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1778712652] [2022-03-19 03:04:44,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1778712652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:04:44,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:04:44,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-03-19 03:04:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465034215] [2022-03-19 03:04:44,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:04:44,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-19 03:04:44,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:04:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-19 03:04:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1005, Invalid=13515, Unknown=0, NotChecked=0, Total=14520 [2022-03-19 03:04:44,509 INFO L87 Difference]: Start difference. First operand 217 states and 220 transitions. Second operand has 108 states, 107 states have (on average 1.97196261682243) internal successors, (211), 106 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:04:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:04:55,961 INFO L93 Difference]: Finished difference Result 226 states and 231 transitions. [2022-03-19 03:04:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-19 03:04:55,961 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 1.97196261682243) internal successors, (211), 106 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-03-19 03:04:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:04:55,962 INFO L225 Difference]: With dead ends: 226 [2022-03-19 03:04:55,962 INFO L226 Difference]: Without dead ends: 219 [2022-03-19 03:04:55,964 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8316 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2237, Invalid=47715, Unknown=0, NotChecked=0, Total=49952 [2022-03-19 03:04:55,964 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 211 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 21170 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 21379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 21170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:04:55,964 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 223 Invalid, 21379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 21170 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-03-19 03:04:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-19 03:04:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-03-19 03:04:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0186915887850467) internal successors, (218), 214 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:04:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2022-03-19 03:04:55,981 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 215 [2022-03-19 03:04:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:04:55,981 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2022-03-19 03:04:55,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 1.97196261682243) internal successors, (211), 106 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:04:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2022-03-19 03:04:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-03-19 03:04:55,982 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:04:55,982 INFO L500 BasicCegarLoop]: trace histogram [103, 101, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:04:55,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-19 03:04:56,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-19 03:04:56,183 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:04:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:04:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1242475292, now seen corresponding path program 101 times [2022-03-19 03:04:56,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:04:56,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [11205568] [2022-03-19 03:04:56,204 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:04:56,248 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-19 03:04:56,248 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 03:04:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash -601542737, now seen corresponding path program 1 times [2022-03-19 03:04:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:04:56,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802892877] [2022-03-19 03:04:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:04:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:04:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:56,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:04:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:56,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:04:56,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802892877] [2022-03-19 03:04:56,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802892877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:04:56,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636348146] [2022-03-19 03:04:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:04:56,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:04:56,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:04:56,306 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:04:56,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-19 03:04:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:04:56,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:04:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:04:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:56,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:04:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:04:56,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636348146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:04:56,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 03:04:56,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 03:05:01,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:05:01,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [11205568] [2022-03-19 03:05:01,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [11205568] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:05:01,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:05:01,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-19 03:05:01,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604115106] [2022-03-19 03:05:01,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:05:01,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-19 03:05:01,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:05:01,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-19 03:05:01,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=13614, Unknown=0, NotChecked=0, Total=14520 [2022-03-19 03:05:01,652 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 109 states, 108 states have (on average 1.9722222222222223) internal successors, (213), 107 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)