/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/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 02:20:02,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 02:20:02,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 02:20:02,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 02:20:02,666 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 02:20:02,674 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 02:20:02,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 02:20:02,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 02:20:02,676 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 02:20:02,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 02:20:02,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 02:20:02,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 02:20:02,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 02:20:02,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 02:20:02,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 02:20:02,677 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 02:20:02,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 02:20:02,678 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 02:20:02,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 02:20:02,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 02:20:02,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 02:20:02,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 02:20:02,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 02:20:02,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:20:02,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 02:20:02,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 02:20:02,679 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 02:20:02,679 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 02:20:02,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 02:20:02,679 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 02:20:02,679 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 02:20:02,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 02:20:02,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 02:20:02,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 02:20:02,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 02:20:02,910 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 02:20:02,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-03-19 02:20:02,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e41cfad08/74c5919a8f9448b29c20dbd0c7c8fba6/FLAG81da89a53 [2022-03-19 02:20:03,351 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 02:20:03,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-03-19 02:20:03,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e41cfad08/74c5919a8f9448b29c20dbd0c7c8fba6/FLAG81da89a53 [2022-03-19 02:20:03,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e41cfad08/74c5919a8f9448b29c20dbd0c7c8fba6 [2022-03-19 02:20:03,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 02:20:03,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 02:20:03,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 02:20:03,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 02:20:03,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 02:20:03,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:20:03" (1/1) ... [2022-03-19 02:20:03,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a681615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:03, skipping insertion in model container [2022-03-19 02:20:03,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 02:20:03" (1/1) ... [2022-03-19 02:20:03,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 02:20:03,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 02:20:03,569 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/insertion_sort-2.c[328,341] [2022-03-19 02:20:03,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:20:03,589 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 02:20:03,597 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/insertion_sort-2.c[328,341] [2022-03-19 02:20:03,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 02:20:03,622 INFO L208 MainTranslator]: Completed translation [2022-03-19 02:20:03,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:03 WrapperNode [2022-03-19 02:20:03,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 02:20:03,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 02:20:03,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 02:20:03,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 02:20:03,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:03" (1/1) ... [2022-03-19 02:20:03,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:03" (1/1) ... [2022-03-19 02:20:03,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:03" (1/1) ... [2022-03-19 02:20:03,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:03" (1/1) ... [2022-03-19 02:20:03,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:03" (1/1) ... [2022-03-19 02:20:03,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:03" (1/1) ... [2022-03-19 02:20:03,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:03" (1/1) ... [2022-03-19 02:20:03,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 02:20:03,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 02:20:03,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 02:20:03,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 02:20:03,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:03" (1/1) ... [2022-03-19 02:20:03,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 02:20:03,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:03,709 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 02:20:03,737 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 02:20:03,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 02:20:03,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 02:20:03,764 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 02:20:03,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 02:20:03,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 02:20:03,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 02:20:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 02:20:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 02:20:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 02:20:03,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 02:20:03,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 02:20:03,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 02:20:03,767 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 02:20:03,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 02:20:03,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 02:20:03,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 02:20:03,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 02:20:03,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 02:20:03,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 02:20:03,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 02:20:03,826 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 02:20:03,828 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 02:20:03,980 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 02:20:03,984 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 02:20:03,984 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-19 02:20:03,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:20:03 BoogieIcfgContainer [2022-03-19 02:20:03,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 02:20:03,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 02:20:03,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 02:20:04,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 02:20:04,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 02:20:03" (1/3) ... [2022-03-19 02:20:04,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3ae3b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:20:04, skipping insertion in model container [2022-03-19 02:20:04,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 02:20:03" (2/3) ... [2022-03-19 02:20:04,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3ae3b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 02:20:04, skipping insertion in model container [2022-03-19 02:20:04,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 02:20:03" (3/3) ... [2022-03-19 02:20:04,003 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2022-03-19 02:20:04,008 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 02:20:04,008 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 02:20:04,074 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 02:20:04,078 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 02:20:04,079 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 02:20:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 02:20:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 02:20:04,127 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:04,128 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:04,128 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:04,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1914549692, now seen corresponding path program 1 times [2022-03-19 02:20:04,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:04,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [734282900] [2022-03-19 02:20:04,145 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:20:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1914549692, now seen corresponding path program 2 times [2022-03-19 02:20:04,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:04,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940122211] [2022-03-19 02:20:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:04,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:04,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:04,343 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 02:20:04,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940122211] [2022-03-19 02:20:04,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940122211] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:04,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:04,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:20:04,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:04,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [734282900] [2022-03-19 02:20:04,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [734282900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:04,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:04,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 02:20:04,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278070833] [2022-03-19 02:20:04,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:04,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 02:20:04,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:04,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 02:20:04,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 02:20:04,373 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 3.6666666666666665) internal successors, (11), 2 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 02:20:04,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:04,405 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-03-19 02:20:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 02:20:04,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have 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 02:20:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:04,411 INFO L225 Difference]: With dead ends: 54 [2022-03-19 02:20:04,411 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 02:20:04,413 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 02:20:04,416 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 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 02:20:04,417 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:20:04,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 02:20:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-19 02:20:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-03-19 02:20:04,448 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-03-19 02:20:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:04,449 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-03-19 02:20:04,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-03-19 02:20:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 02:20:04,450 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:04,450 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:04,450 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 02:20:04,451 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:04,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:04,451 INFO L85 PathProgramCache]: Analyzing trace with hash 314290466, now seen corresponding path program 1 times [2022-03-19 02:20:04,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:04,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1811138907] [2022-03-19 02:20:04,454 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 02:20:04,454 INFO L85 PathProgramCache]: Analyzing trace with hash 314290466, now seen corresponding path program 2 times [2022-03-19 02:20:04,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:04,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257081646] [2022-03-19 02:20:04,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:04,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:04,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:04,629 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 02:20:04,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257081646] [2022-03-19 02:20:04,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257081646] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:04,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:04,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:20:04,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:04,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1811138907] [2022-03-19 02:20:04,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1811138907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:04,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:04,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:20:04,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526208571] [2022-03-19 02:20:04,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:04,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:20:04,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:04,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:20:04,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-19 02:20:04,638 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 02:20:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:04,781 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-03-19 02:20:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:20:04,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 02:20:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:04,784 INFO L225 Difference]: With dead ends: 49 [2022-03-19 02:20:04,785 INFO L226 Difference]: Without dead ends: 28 [2022-03-19 02:20:04,785 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-19 02:20:04,786 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:04,787 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-19 02:20:04,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-19 02:20:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:04,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-19 02:20:04,792 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2022-03-19 02:20:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:04,792 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-19 02:20:04,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 02:20:04,792 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-19 02:20:04,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 02:20:04,793 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:04,793 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:04,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 02:20:04,793 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:04,794 INFO L85 PathProgramCache]: Analyzing trace with hash 408725728, now seen corresponding path program 1 times [2022-03-19 02:20:04,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:04,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1517657475] [2022-03-19 02:20:04,806 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:04,806 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:04,806 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:04,806 INFO L85 PathProgramCache]: Analyzing trace with hash 408725728, now seen corresponding path program 2 times [2022-03-19 02:20:04,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:04,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201331890] [2022-03-19 02:20:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:04,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:04,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:20:04,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201331890] [2022-03-19 02:20:04,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201331890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:04,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796147615] [2022-03-19 02:20:04,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:04,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:04,976 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 02:20:04,977 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 02:20:05,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 02:20:05,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:05,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 02:20:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:20:05,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 02:20:05,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796147615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:05,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 02:20:05,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-19 02:20:05,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:05,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1517657475] [2022-03-19 02:20:05,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1517657475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:05,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:05,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 02:20:05,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358362038] [2022-03-19 02:20:05,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:05,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 02:20:05,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 02:20:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 02:20:05,198 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:05,248 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-03-19 02:20:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 02:20:05,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 02:20:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:05,250 INFO L225 Difference]: With dead ends: 45 [2022-03-19 02:20:05,250 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 02:20:05,250 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-19 02:20:05,251 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:05,252 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 93 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:20:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 02:20:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-03-19 02:20:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-03-19 02:20:05,258 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2022-03-19 02:20:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:05,259 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-03-19 02:20:05,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-03-19 02:20:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 02:20:05,260 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:05,260 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:05,285 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 02:20:05,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:05,480 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash -924605581, now seen corresponding path program 1 times [2022-03-19 02:20:05,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:05,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1339836344] [2022-03-19 02:20:05,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:05,482 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:05,482 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash -924605581, now seen corresponding path program 2 times [2022-03-19 02:20:05,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:05,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366934420] [2022-03-19 02:20:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:05,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:05,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:20:05,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:05,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366934420] [2022-03-19 02:20:05,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366934420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:05,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102091429] [2022-03-19 02:20:05,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:05,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:05,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:05,627 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 02:20:05,647 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 02:20:05,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:05,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:05,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 02:20:05,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:20:05,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:20:05,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102091429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:05,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:05,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-19 02:20:05,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:05,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1339836344] [2022-03-19 02:20:05,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1339836344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:05,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:05,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 02:20:05,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445088582] [2022-03-19 02:20:05,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:05,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 02:20:05,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:05,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 02:20:05,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-19 02:20:05,896 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 02:20:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:05,998 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-03-19 02:20:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 02:20:05,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 02:20:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:05,999 INFO L225 Difference]: With dead ends: 55 [2022-03-19 02:20:05,999 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 02:20:05,999 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-19 02:20:06,002 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:06,003 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 36 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:20:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 02:20:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-03-19 02:20:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-19 02:20:06,013 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2022-03-19 02:20:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:06,013 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-19 02:20:06,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 02:20:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-19 02:20:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 02:20:06,015 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:06,015 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:06,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 02:20:06,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 02:20:06,232 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1080556849, now seen corresponding path program 3 times [2022-03-19 02:20:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:06,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1029070780] [2022-03-19 02:20:06,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:06,234 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:06,234 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:06,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1080556849, now seen corresponding path program 4 times [2022-03-19 02:20:06,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:06,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485395207] [2022-03-19 02:20:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:06,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:06,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:20:06,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:06,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485395207] [2022-03-19 02:20:06,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485395207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:06,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874030572] [2022-03-19 02:20:06,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:06,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:06,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:06,632 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 02:20:06,668 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 02:20:06,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:06,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:06,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 02:20:06,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:06,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:06,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-03-19 02:20:06,909 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:20:06,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 02:20:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:20:06,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:07,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-19 02:20:07,075 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-03-19 02:20:07,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2022-03-19 02:20:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:20:07,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874030572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:07,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:07,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 12] total 29 [2022-03-19 02:20:07,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:07,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1029070780] [2022-03-19 02:20:07,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1029070780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:07,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:07,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:20:07,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044012606] [2022-03-19 02:20:07,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:07,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:20:07,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:07,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:20:07,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2022-03-19 02:20:07,173 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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 02:20:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:07,657 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-03-19 02:20:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 02:20:07,657 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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 02:20:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:07,661 INFO L225 Difference]: With dead ends: 65 [2022-03-19 02:20:07,661 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 02:20:07,662 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=1733, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 02:20:07,664 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:07,665 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 56 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:20:07,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 02:20:07,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 44. [2022-03-19 02:20:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:20:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-03-19 02:20:07,701 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-03-19 02:20:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:07,702 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-03-19 02:20:07,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 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 02:20:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-03-19 02:20:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 02:20:07,703 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:07,703 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:07,722 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 02:20:07,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:07,904 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1781621427, now seen corresponding path program 1 times [2022-03-19 02:20:07,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:07,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008598475] [2022-03-19 02:20:07,909 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:07,909 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:07,909 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:07,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1781621427, now seen corresponding path program 2 times [2022-03-19 02:20:07,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:07,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193243740] [2022-03-19 02:20:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:07,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:07,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:20:08,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:08,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193243740] [2022-03-19 02:20:08,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193243740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:08,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:08,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:20:08,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:08,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008598475] [2022-03-19 02:20:08,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008598475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:08,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:08,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 02:20:08,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706819515] [2022-03-19 02:20:08,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:08,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 02:20:08,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:08,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 02:20:08,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 02:20:08,005 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 02:20:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:08,081 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-03-19 02:20:08,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 02:20:08,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 25 [2022-03-19 02:20:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:08,085 INFO L225 Difference]: With dead ends: 82 [2022-03-19 02:20:08,085 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 02:20:08,086 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-19 02:20:08,087 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:08,087 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 30 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 02:20:08,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 02:20:08,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-03-19 02:20:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:20:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-03-19 02:20:08,103 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2022-03-19 02:20:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:08,104 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-03-19 02:20:08,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 02:20:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-03-19 02:20:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 02:20:08,105 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:08,105 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:08,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 02:20:08,105 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1755898038, now seen corresponding path program 1 times [2022-03-19 02:20:08,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:08,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [768891534] [2022-03-19 02:20:08,108 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:08,108 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:08,108 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1755898038, now seen corresponding path program 2 times [2022-03-19 02:20:08,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:08,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935111108] [2022-03-19 02:20:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:08,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:08,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:20:08,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:08,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935111108] [2022-03-19 02:20:08,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935111108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:08,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31900299] [2022-03-19 02:20:08,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:08,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:08,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:08,460 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 02:20:08,462 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 02:20:08,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:08,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:08,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 02:20:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:08,630 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-03-19 02:20:08,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-19 02:20:08,767 INFO L356 Elim1Store]: treesize reduction 76, result has 10.6 percent of original size [2022-03-19 02:20:08,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2022-03-19 02:20:08,873 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-03-19 02:20:08,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2022-03-19 02:20:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:20:08,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:09,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2022-03-19 02:20:09,350 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-19 02:20:09,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 383 treesize of output 347 [2022-03-19 02:20:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 02:20:10,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31900299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:10,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:10,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 36 [2022-03-19 02:20:10,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:10,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [768891534] [2022-03-19 02:20:10,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [768891534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:10,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:10,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 02:20:10,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024321713] [2022-03-19 02:20:10,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:10,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 02:20:10,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 02:20:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1123, Unknown=1, NotChecked=0, Total=1260 [2022-03-19 02:20:10,351 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:10,966 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-03-19 02:20:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 02:20:10,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 02:20:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:10,968 INFO L225 Difference]: With dead ends: 104 [2022-03-19 02:20:10,968 INFO L226 Difference]: Without dead ends: 73 [2022-03-19 02:20:10,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=338, Invalid=2417, Unknown=1, NotChecked=0, Total=2756 [2022-03-19 02:20:10,970 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 124 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:10,970 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 48 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:20:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-19 02:20:10,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2022-03-19 02:20:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:20:10,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-03-19 02:20:10,993 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 28 [2022-03-19 02:20:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:11,003 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-03-19 02:20:11,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-03-19 02:20:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 02:20:11,004 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:11,005 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:11,052 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 02:20:11,205 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 02:20:11,205 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:11,206 INFO L85 PathProgramCache]: Analyzing trace with hash -990333180, now seen corresponding path program 5 times [2022-03-19 02:20:11,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:11,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [365565566] [2022-03-19 02:20:11,208 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:11,208 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:11,208 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash -990333180, now seen corresponding path program 6 times [2022-03-19 02:20:11,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:11,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149979066] [2022-03-19 02:20:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:11,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:11,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:20:11,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:11,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149979066] [2022-03-19 02:20:11,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149979066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:11,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683286986] [2022-03-19 02:20:11,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:20:11,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:11,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:11,311 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 02:20:11,357 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 02:20:11,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 02:20:11,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:11,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 02:20:11,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:20:11,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:20:11,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683286986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:11,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:11,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-19 02:20:11,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:11,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [365565566] [2022-03-19 02:20:11,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [365565566] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:11,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:11,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:20:11,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147019988] [2022-03-19 02:20:11,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:11,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:20:11,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:11,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:20:11,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-19 02:20:11,666 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 02:20:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:11,883 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-03-19 02:20:11,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 02:20:11,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 02:20:11,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:11,884 INFO L225 Difference]: With dead ends: 86 [2022-03-19 02:20:11,885 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 02:20:11,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-19 02:20:11,886 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 124 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:11,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 39 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:11,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 02:20:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2022-03-19 02:20:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 52 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:20:11,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-03-19 02:20:11,913 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 31 [2022-03-19 02:20:11,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:11,914 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-03-19 02:20:11,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 02:20:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-03-19 02:20:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 02:20:11,918 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:11,918 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:11,942 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 02:20:12,135 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 02:20:12,136 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash -405243253, now seen corresponding path program 1 times [2022-03-19 02:20:12,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:12,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1604124949] [2022-03-19 02:20:12,137 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:12,137 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:12,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:12,137 INFO L85 PathProgramCache]: Analyzing trace with hash -405243253, now seen corresponding path program 2 times [2022-03-19 02:20:12,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:12,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032641520] [2022-03-19 02:20:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:12,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:12,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:12,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 02:20:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:20:12,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:12,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032641520] [2022-03-19 02:20:12,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032641520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:12,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485545565] [2022-03-19 02:20:12,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:12,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:12,275 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 02:20:12,276 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 02:20:12,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:12,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:12,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 02:20:12,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:20:12,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:20:12,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485545565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:12,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:12,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-19 02:20:12,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:12,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1604124949] [2022-03-19 02:20:12,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1604124949] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:12,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:12,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:20:12,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107536277] [2022-03-19 02:20:12,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:12,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:20:12,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:12,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:20:12,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 02:20:12,642 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:12,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:12,876 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2022-03-19 02:20:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 02:20:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-03-19 02:20:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:12,877 INFO L225 Difference]: With dead ends: 78 [2022-03-19 02:20:12,877 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 02:20:12,878 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-03-19 02:20:12,878 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:12,878 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 38 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:20:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 02:20:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-03-19 02:20:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-03-19 02:20:12,888 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 33 [2022-03-19 02:20:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:12,888 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-03-19 02:20:12,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:20:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-03-19 02:20:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 02:20:12,889 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:12,889 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:12,908 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 02:20:13,090 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 02:20:13,090 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:13,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:13,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1306424002, now seen corresponding path program 7 times [2022-03-19 02:20:13,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:13,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806049331] [2022-03-19 02:20:13,093 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:13,093 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:13,093 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:13,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1306424002, now seen corresponding path program 8 times [2022-03-19 02:20:13,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:13,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400773845] [2022-03-19 02:20:13,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:13,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:13,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:20:13,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:13,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400773845] [2022-03-19 02:20:13,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400773845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:13,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772351869] [2022-03-19 02:20:13,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:13,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:13,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:13,649 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 02:20:13,651 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 02:20:13,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:13,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:13,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 02:20:13,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:13,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:13,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-03-19 02:20:13,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:13,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:13,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:13,957 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:20:13,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-19 02:20:13,994 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:20:13,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 02:20:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:20:14,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:39,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-03-19 02:20:39,868 INFO L356 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2022-03-19 02:20:39,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1429 treesize of output 1347 [2022-03-19 02:20:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:20:43,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772351869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:43,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:43,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 15] total 34 [2022-03-19 02:20:43,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:43,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806049331] [2022-03-19 02:20:43,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806049331] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:43,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:43,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 02:20:43,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973037056] [2022-03-19 02:20:43,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:43,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 02:20:43,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:43,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 02:20:43,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=952, Unknown=21, NotChecked=0, Total=1122 [2022-03-19 02:20:43,493 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 02:20:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:44,418 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-03-19 02:20:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 02:20:44,418 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 02:20:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:44,419 INFO L225 Difference]: With dead ends: 118 [2022-03-19 02:20:44,419 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 02:20:44,420 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=527, Invalid=2874, Unknown=21, NotChecked=0, Total=3422 [2022-03-19 02:20:44,420 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 149 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:44,420 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 58 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 02:20:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 02:20:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2022-03-19 02:20:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 58 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:20:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-03-19 02:20:44,435 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 33 [2022-03-19 02:20:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:44,435 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-03-19 02:20:44,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 02:20:44,438 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-03-19 02:20:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 02:20:44,440 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:44,440 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:44,469 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 02:20:44,643 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 02:20:44,644 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:44,644 INFO L85 PathProgramCache]: Analyzing trace with hash -350564349, now seen corresponding path program 1 times [2022-03-19 02:20:44,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:44,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1007432618] [2022-03-19 02:20:44,646 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:44,646 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:44,646 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:44,646 INFO L85 PathProgramCache]: Analyzing trace with hash -350564349, now seen corresponding path program 2 times [2022-03-19 02:20:44,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:44,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743254962] [2022-03-19 02:20:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:44,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:44,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:20:44,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:44,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743254962] [2022-03-19 02:20:44,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743254962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:44,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844322272] [2022-03-19 02:20:44,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:20:44,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:44,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:44,953 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 02:20:44,954 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 02:20:45,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:20:45,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 02:20:45,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:45,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:45,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-03-19 02:20:45,298 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:20:45,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 02:20:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:20:45,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:45,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-19 02:20:45,476 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-03-19 02:20:45,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2022-03-19 02:20:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:20:45,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844322272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:20:45,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:20:45,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 32 [2022-03-19 02:20:45,615 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:20:45,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1007432618] [2022-03-19 02:20:45,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1007432618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:20:45,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:20:45,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 02:20:45,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024738380] [2022-03-19 02:20:45,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:20:45,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 02:20:45,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:45,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 02:20:45,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-19 02:20:45,617 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:20:46,642 INFO L93 Difference]: Finished difference Result 164 states and 211 transitions. [2022-03-19 02:20:46,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 02:20:46,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-19 02:20:46,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:20:46,644 INFO L225 Difference]: With dead ends: 164 [2022-03-19 02:20:46,644 INFO L226 Difference]: Without dead ends: 162 [2022-03-19 02:20:46,645 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=580, Invalid=3080, Unknown=0, NotChecked=0, Total=3660 [2022-03-19 02:20:46,646 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 178 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:20:46,646 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 66 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 02:20:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-19 02:20:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 84. [2022-03-19 02:20:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.3157894736842106) internal successors, (100), 77 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:20:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-03-19 02:20:46,680 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 36 [2022-03-19 02:20:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:20:46,681 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-03-19 02:20:46,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:20:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-03-19 02:20:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 02:20:46,682 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:20:46,682 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:20:46,708 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 02:20:46,883 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 02:20:46,884 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:20:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:20:46,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1169352267, now seen corresponding path program 3 times [2022-03-19 02:20:46,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:20:46,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1927885591] [2022-03-19 02:20:46,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:20:46,886 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:20:46,886 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:20:46,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1169352267, now seen corresponding path program 4 times [2022-03-19 02:20:46,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:20:46,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771412974] [2022-03-19 02:20:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:20:46,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:20:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:47,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:20:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:20:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:20:47,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:20:47,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771412974] [2022-03-19 02:20:47,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771412974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:20:47,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252504681] [2022-03-19 02:20:47,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:20:47,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:20:47,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:20:47,376 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 02:20:47,377 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 02:20:47,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:20:47,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:20:47,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 02:20:47,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:20:47,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:47,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-19 02:20:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:47,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 02:20:47,858 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:20:47,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 42 [2022-03-19 02:20:48,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:48,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:48,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:20:48,005 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:20:48,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-19 02:20:48,045 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:20:48,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-03-19 02:20:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:20:48,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:20:56,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2022-03-19 02:20:56,905 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-03-19 02:20:56,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 5429 treesize of output 5235 [2022-03-19 02:21:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 1 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:21:44,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252504681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:44,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:44,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 16] total 42 [2022-03-19 02:21:44,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:44,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1927885591] [2022-03-19 02:21:44,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1927885591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:44,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:44,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 02:21:44,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078183550] [2022-03-19 02:21:44,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:44,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 02:21:44,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:44,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 02:21:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1515, Unknown=8, NotChecked=0, Total=1722 [2022-03-19 02:21:44,293 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:21:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:45,525 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2022-03-19 02:21:45,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 02:21:45,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-19 02:21:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:45,526 INFO L225 Difference]: With dead ends: 134 [2022-03-19 02:21:45,526 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 02:21:45,527 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=429, Invalid=3103, Unknown=8, NotChecked=0, Total=3540 [2022-03-19 02:21:45,527 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 120 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:45,528 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 84 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 02:21:45,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 02:21:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 91. [2022-03-19 02:21:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.3373493975903614) internal successors, (111), 84 states have internal predecessors, (111), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:21:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2022-03-19 02:21:45,552 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 36 [2022-03-19 02:21:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:45,552 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2022-03-19 02:21:45,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:21:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2022-03-19 02:21:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 02:21:45,554 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:45,554 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:21:45,573 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 02:21:45,771 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 02:21:45,771 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:45,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1631396062, now seen corresponding path program 3 times [2022-03-19 02:21:45,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:45,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236682839] [2022-03-19 02:21:45,773 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:45,773 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:45,773 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1631396062, now seen corresponding path program 4 times [2022-03-19 02:21:45,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:45,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455960704] [2022-03-19 02:21:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:45,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:45,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:21:45,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:45,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455960704] [2022-03-19 02:21:45,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455960704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:45,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714990680] [2022-03-19 02:21:45,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:45,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:45,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:45,878 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 02:21:45,882 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 02:21:45,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:45,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:45,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 02:21:45,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:21:46,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:21:46,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714990680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:46,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:46,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 10 [2022-03-19 02:21:46,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:46,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236682839] [2022-03-19 02:21:46,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236682839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:46,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:46,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 02:21:46,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730925618] [2022-03-19 02:21:46,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:46,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 02:21:46,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:46,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 02:21:46,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 02:21:46,114 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 02:21:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:46,545 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2022-03-19 02:21:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 02:21:46,546 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 39 [2022-03-19 02:21:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:46,547 INFO L225 Difference]: With dead ends: 162 [2022-03-19 02:21:46,547 INFO L226 Difference]: Without dead ends: 118 [2022-03-19 02:21:46,548 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2022-03-19 02:21:46,548 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:46,548 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 52 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:21:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-19 02:21:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 68. [2022-03-19 02:21:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 61 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:21:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2022-03-19 02:21:46,574 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 39 [2022-03-19 02:21:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:46,574 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2022-03-19 02:21:46,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 02:21:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2022-03-19 02:21:46,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 02:21:46,576 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:46,576 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:21:46,608 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 02:21:46,800 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 02:21:46,801 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash -930331484, now seen corresponding path program 5 times [2022-03-19 02:21:46,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:46,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1559426542] [2022-03-19 02:21:46,803 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:46,803 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:46,803 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash -930331484, now seen corresponding path program 6 times [2022-03-19 02:21:46,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:46,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031606346] [2022-03-19 02:21:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:46,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:47,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 02:21:47,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:47,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031606346] [2022-03-19 02:21:47,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031606346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:47,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194160891] [2022-03-19 02:21:47,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:47,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:47,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:47,289 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 02:21:47,290 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 02:21:47,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:21:47,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:47,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 02:21:47,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:47,572 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-03-19 02:21:47,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-19 02:21:47,681 INFO L356 Elim1Store]: treesize reduction 76, result has 10.6 percent of original size [2022-03-19 02:21:47,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2022-03-19 02:21:47,772 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-03-19 02:21:47,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2022-03-19 02:21:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:21:47,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:48,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2022-03-19 02:21:48,163 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-19 02:21:48,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1439 treesize of output 1331 [2022-03-19 02:21:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:21:48,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194160891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:48,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:48,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 43 [2022-03-19 02:21:48,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:48,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1559426542] [2022-03-19 02:21:48,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1559426542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:48,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:48,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 02:21:48,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506448322] [2022-03-19 02:21:48,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:48,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 02:21:48,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 02:21:48,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 02:21:48,725 INFO L87 Difference]: Start difference. First operand 68 states and 81 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 02:21:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:50,252 INFO L93 Difference]: Finished difference Result 129 states and 156 transitions. [2022-03-19 02:21:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 02:21:50,252 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 02:21:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:50,255 INFO L225 Difference]: With dead ends: 129 [2022-03-19 02:21:50,255 INFO L226 Difference]: Without dead ends: 127 [2022-03-19 02:21:50,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=660, Invalid=4742, Unknown=0, NotChecked=0, Total=5402 [2022-03-19 02:21:50,259 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 152 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:50,260 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 60 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 02:21:50,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-19 02:21:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 68. [2022-03-19 02:21:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 61 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 02:21:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2022-03-19 02:21:50,286 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 39 [2022-03-19 02:21:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:50,286 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2022-03-19 02:21:50,286 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 02:21:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2022-03-19 02:21:50,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 02:21:50,287 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:50,287 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:21:50,317 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 02:21:50,499 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 02:21:50,499 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:50,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1624035100, now seen corresponding path program 3 times [2022-03-19 02:21:50,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:50,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [790674836] [2022-03-19 02:21:50,500 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:50,500 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:50,501 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:50,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1624035100, now seen corresponding path program 4 times [2022-03-19 02:21:50,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:50,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729701498] [2022-03-19 02:21:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:50,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:50,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:50,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 02:21:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:21:50,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:50,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729701498] [2022-03-19 02:21:50,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729701498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:50,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110345723] [2022-03-19 02:21:50,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 02:21:50,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:50,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:50,751 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 02:21:50,752 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 02:21:50,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 02:21:50,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:50,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 02:21:50,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:50,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-19 02:21:51,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:21:51,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-03-19 02:21:51,247 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:21:51,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 02:21:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:21:51,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:51,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2022-03-19 02:21:51,638 INFO L356 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2022-03-19 02:21:51,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 459 treesize of output 436 [2022-03-19 02:21:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:21:51,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110345723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:51,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:51,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 34 [2022-03-19 02:21:51,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:51,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [790674836] [2022-03-19 02:21:51,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [790674836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:51,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:51,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 02:21:51,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629165036] [2022-03-19 02:21:51,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:51,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 02:21:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 02:21:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 02:21:51,942 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:21:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:52,801 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2022-03-19 02:21:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 02:21:52,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-03-19 02:21:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:52,802 INFO L225 Difference]: With dead ends: 99 [2022-03-19 02:21:52,803 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 02:21:52,804 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=272, Invalid=2178, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 02:21:52,804 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 107 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:52,804 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 79 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 02:21:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 02:21:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2022-03-19 02:21:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 74 states have internal predecessors, (87), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 02:21:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2022-03-19 02:21:52,835 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 41 [2022-03-19 02:21:52,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:52,836 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2022-03-19 02:21:52,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:21:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2022-03-19 02:21:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 02:21:52,837 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:52,837 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:21:52,864 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 02:21:53,060 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 02:21:53,062 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:53,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1436661232, now seen corresponding path program 5 times [2022-03-19 02:21:53,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:53,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1793122763] [2022-03-19 02:21:53,064 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:53,064 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:53,064 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:53,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1436661232, now seen corresponding path program 6 times [2022-03-19 02:21:53,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:53,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364643781] [2022-03-19 02:21:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:53,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:53,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:21:53,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:53,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364643781] [2022-03-19 02:21:53,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364643781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:53,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642034724] [2022-03-19 02:21:53,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 02:21:53,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:53,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:53,228 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 02:21:53,240 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 02:21:53,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 02:21:53,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:53,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 02:21:53,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:21:53,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:21:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 02:21:54,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642034724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:21:54,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:21:54,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-03-19 02:21:54,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:21:54,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1793122763] [2022-03-19 02:21:54,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1793122763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:21:54,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:21:54,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 02:21:54,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989734155] [2022-03-19 02:21:54,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:21:54,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 02:21:54,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:54,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 02:21:54,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-19 02:21:54,023 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:21:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:21:54,383 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2022-03-19 02:21:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 02:21:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-19 02:21:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:21:54,384 INFO L225 Difference]: With dead ends: 164 [2022-03-19 02:21:54,384 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 02:21:54,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-03-19 02:21:54,386 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 145 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 02:21:54,386 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 60 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 02:21:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 02:21:54,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2022-03-19 02:21:54,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 103 states have internal predecessors, (122), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 02:21:54,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-03-19 02:21:54,434 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 42 [2022-03-19 02:21:54,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:21:54,435 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-03-19 02:21:54,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 02:21:54,435 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-03-19 02:21:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 02:21:54,435 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:21:54,436 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:21:54,463 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 02:21:54,651 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 02:21:54,651 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:21:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:21:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2084807843, now seen corresponding path program 1 times [2022-03-19 02:21:54,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:21:54,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1290601571] [2022-03-19 02:21:54,653 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:21:54,653 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:21:54,653 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:21:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2084807843, now seen corresponding path program 2 times [2022-03-19 02:21:54,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:21:54,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358102393] [2022-03-19 02:21:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:21:54,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:21:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:55,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:21:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:55,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 02:21:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:21:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:21:55,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:21:55,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358102393] [2022-03-19 02:21:55,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358102393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:21:55,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537601143] [2022-03-19 02:21:55,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:21:55,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:21:55,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:21:55,108 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 02:21:55,109 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 02:21:55,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:21:55,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:21:55,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 02:21:55,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:21:55,329 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-03-19 02:21:55,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-03-19 02:21:55,587 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-03-19 02:21:55,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-03-19 02:22:07,786 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-19 02:22:07,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2022-03-19 02:22:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:22:07,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:14,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-03-19 02:22:14,314 INFO L356 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2022-03-19 02:22:14,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 439 treesize of output 405 [2022-03-19 02:22:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 02:22:14,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537601143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:14,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:14,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 36 [2022-03-19 02:22:14,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:14,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1290601571] [2022-03-19 02:22:14,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1290601571] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:14,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:14,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 02:22:14,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433961522] [2022-03-19 02:22:14,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:14,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 02:22:14,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:14,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 02:22:14,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1110, Unknown=8, NotChecked=0, Total=1260 [2022-03-19 02:22:14,602 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:22:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:17,831 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2022-03-19 02:22:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 02:22:17,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-03-19 02:22:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:17,833 INFO L225 Difference]: With dead ends: 159 [2022-03-19 02:22:17,833 INFO L226 Difference]: Without dead ends: 157 [2022-03-19 02:22:17,834 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 68 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=481, Invalid=3292, Unknown=9, NotChecked=0, Total=3782 [2022-03-19 02:22:17,834 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 112 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 02:22:17,834 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 93 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 02:22:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-19 02:22:17,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 115. [2022-03-19 02:22:17,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 104 states have (on average 1.2115384615384615) internal successors, (126), 106 states have internal predecessors, (126), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 02:22:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 137 transitions. [2022-03-19 02:22:17,867 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 137 transitions. Word has length 44 [2022-03-19 02:22:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:17,867 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 137 transitions. [2022-03-19 02:22:17,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:22:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 137 transitions. [2022-03-19 02:22:17,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 02:22:17,868 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:17,868 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:22:17,901 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 02:22:18,084 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 02:22:18,084 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:18,085 INFO L85 PathProgramCache]: Analyzing trace with hash 521215711, now seen corresponding path program 1 times [2022-03-19 02:22:18,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:18,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1410809925] [2022-03-19 02:22:18,086 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:18,086 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:18,086 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:18,086 INFO L85 PathProgramCache]: Analyzing trace with hash 521215711, now seen corresponding path program 2 times [2022-03-19 02:22:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:18,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021333078] [2022-03-19 02:22:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:18,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:18,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:18,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 02:22:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 02:22:18,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:18,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021333078] [2022-03-19 02:22:18,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021333078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:18,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710684201] [2022-03-19 02:22:18,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:22:18,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:18,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:18,179 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 02:22:18,179 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 02:22:18,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:22:18,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:18,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 02:22:18,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 02:22:18,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 02:22:18,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710684201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 02:22:18,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 02:22:18,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 9 [2022-03-19 02:22:18,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 02:22:18,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1410809925] [2022-03-19 02:22:18,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1410809925] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 02:22:18,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 02:22:18,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 02:22:18,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335564204] [2022-03-19 02:22:18,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 02:22:18,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 02:22:18,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 02:22:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-19 02:22:18,379 INFO L87 Difference]: Start difference. First operand 115 states and 137 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:22:18,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 02:22:18,651 INFO L93 Difference]: Finished difference Result 212 states and 254 transitions. [2022-03-19 02:22:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 02:22:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-03-19 02:22:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 02:22:18,652 INFO L225 Difference]: With dead ends: 212 [2022-03-19 02:22:18,652 INFO L226 Difference]: Without dead ends: 153 [2022-03-19 02:22:18,653 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-03-19 02:22:18,653 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 02:22:18,653 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 46 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 02:22:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-19 02:22:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 117. [2022-03-19 02:22:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 106 states have (on average 1.169811320754717) internal successors, (124), 108 states have internal predecessors, (124), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 02:22:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 135 transitions. [2022-03-19 02:22:18,692 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 135 transitions. Word has length 44 [2022-03-19 02:22:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 02:22:18,693 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 135 transitions. [2022-03-19 02:22:18,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 02:22:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 135 transitions. [2022-03-19 02:22:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 02:22:18,693 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 02:22:18,693 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 02:22:18,717 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 02:22:18,912 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 02:22:18,912 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 02:22:18,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 02:22:18,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1979815022, now seen corresponding path program 7 times [2022-03-19 02:22:18,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 02:22:18,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1201253809] [2022-03-19 02:22:18,914 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 02:22:18,914 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-19 02:22:18,914 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 02:22:18,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1979815022, now seen corresponding path program 8 times [2022-03-19 02:22:18,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 02:22:18,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465577408] [2022-03-19 02:22:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 02:22:18,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 02:22:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:19,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 02:22:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 02:22:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 02:22:19,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 02:22:19,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465577408] [2022-03-19 02:22:19,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465577408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 02:22:19,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134689190] [2022-03-19 02:22:19,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 02:22:19,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 02:22:19,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 02:22:19,620 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 02:22:19,639 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 02:22:19,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 02:22:19,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 02:22:19,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 02:22:19,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 02:22:19,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:19,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-03-19 02:22:20,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:20,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:20,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:20,011 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:22:20,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-03-19 02:22:20,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:20,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:20,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:20,085 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:22:20,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-03-19 02:22:20,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:20,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:20,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 02:22:20,132 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:22:20,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-03-19 02:22:20,168 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 02:22:20,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 02:22:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 02:22:20,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 02:22:28,786 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_58 Int)) (or (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_ArrVal_429 Int)) (let ((.cse0 (let ((.cse1 (* c_main_~j~0 4))) (store (store (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* v_main_~i~0_58 4) 4) v_ArrVal_429) (+ |c_main_~#v~0.offset| .cse1 4) v_ArrVal_431) (+ |c_main_~#v~0.offset| .cse1) v_ArrVal_434)))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4))))) (not (<= c_main_~j~0 (+ v_main_~i~0_58 1))))) is different from false [2022-03-19 02:22:29,641 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~i~0_58 Int) (v_ArrVal_429 Int)) (or (not (<= c_main_~j~0 v_main_~i~0_58)) (let ((.cse0 (let ((.cse1 (* c_main_~j~0 4))) (store (store (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* v_main_~i~0_58 4) 4) v_ArrVal_429) (+ |c_main_~#v~0.offset| 8 .cse1) v_ArrVal_431) (+ |c_main_~#v~0.offset| .cse1 4) v_ArrVal_434)))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4)))))) is different from false [2022-03-19 02:22:30,466 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~i~0_58 Int) (v_ArrVal_429 Int) (v_ArrVal_427 Int)) (or (not (<= c_main_~key~0 v_ArrVal_427)) (let ((.cse0 (let ((.cse1 (* c_main_~j~0 4))) (store (store (store (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ (* c_main_~i~0 4) |c_main_~#v~0.offset| 4) v_ArrVal_427) (+ |c_main_~#v~0.offset| (* v_main_~i~0_58 4) 4) v_ArrVal_429) (+ |c_main_~#v~0.offset| 8 .cse1) v_ArrVal_431) (+ |c_main_~#v~0.offset| .cse1 4) v_ArrVal_434)))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4)))) (not (<= c_main_~j~0 v_main_~i~0_58)))) is different from false [2022-03-19 02:22:31,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 83 [2022-03-19 02:22:31,553 INFO L356 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2022-03-19 02:22:31,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 339825 treesize of output 333695 [2022-03-19 02:22:46,543 WARN L232 SmtUtils]: Spent 14.99s on a formula simplification. DAG size of input: 672 DAG size of output: 667 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-19 02:24:50,526 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-19 02:24:50,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-19 02:24:50,738 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 02:24:50,739 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.runStrategy(AcceleratedInterpolationCore.java:300) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:275) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-19 02:24:50,745 INFO L158 Benchmark]: Toolchain (without parser) took 287372.52ms. Allocated memory was 182.5MB in the beginning and 777.0MB in the end (delta: 594.5MB). Free memory was 134.0MB in the beginning and 410.8MB in the end (delta: -276.8MB). Peak memory consumption was 450.8MB. Max. memory is 8.0GB. [2022-03-19 02:24:50,745 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 182.5MB. Free memory is still 151.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 02:24:50,745 INFO L158 Benchmark]: CACSL2BoogieTranslator took 248.26ms. Allocated memory is still 182.5MB. Free memory was 133.8MB in the beginning and 159.2MB in the end (delta: -25.4MB). Peak memory consumption was 13.8MB. Max. memory is 8.0GB. [2022-03-19 02:24:50,746 INFO L158 Benchmark]: Boogie Preprocessor took 39.01ms. Allocated memory is still 182.5MB. Free memory was 159.2MB in the beginning and 157.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 02:24:50,746 INFO L158 Benchmark]: RCFGBuilder took 323.00ms. Allocated memory is still 182.5MB. Free memory was 157.8MB in the beginning and 146.6MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 02:24:50,747 INFO L158 Benchmark]: TraceAbstraction took 286757.54ms. Allocated memory was 182.5MB in the beginning and 777.0MB in the end (delta: 594.5MB). Free memory was 146.3MB in the beginning and 410.8MB in the end (delta: -264.5MB). Peak memory consumption was 463.2MB. Max. memory is 8.0GB. [2022-03-19 02:24:50,749 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 182.5MB. Free memory is still 151.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 248.26ms. Allocated memory is still 182.5MB. Free memory was 133.8MB in the beginning and 159.2MB in the end (delta: -25.4MB). Peak memory consumption was 13.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.01ms. Allocated memory is still 182.5MB. Free memory was 159.2MB in the beginning and 157.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 323.00ms. Allocated memory is still 182.5MB. Free memory was 157.8MB in the beginning and 146.6MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 286757.54ms. Allocated memory was 182.5MB in the beginning and 777.0MB in the end (delta: 594.5MB). Free memory was 146.3MB in the beginning and 410.8MB in the end (delta: -264.5MB). Peak memory consumption was 463.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-19 02:24:50,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...