/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:58:28,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:58:28,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:58:28,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:58:28,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:58:28,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:58:28,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:58:28,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:58:28,659 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:58:28,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:58:28,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:58:28,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:58:28,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:58:28,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:58:28,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:58:28,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:58:28,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:58:28,663 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:58:28,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:58:28,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:58:28,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:58:28,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:58:28,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:58:28,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:58:28,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:58:28,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:58:28,664 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:58:28,664 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:58:28,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:58:28,664 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:58:28,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:58:28,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:58:28,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:58:28,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:58:28,904 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:58:28,904 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:58:28,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-03-20 18:58:28,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bef79e99/fbee3778b1a64caba0108f9961359497/FLAG366060494 [2022-03-20 18:58:29,359 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:58:29,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-03-20 18:58:29,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bef79e99/fbee3778b1a64caba0108f9961359497/FLAG366060494 [2022-03-20 18:58:29,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bef79e99/fbee3778b1a64caba0108f9961359497 [2022-03-20 18:58:29,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:58:29,382 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:58:29,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:58:29,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:58:29,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:58:29,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:58:29" (1/1) ... [2022-03-20 18:58:29,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700a94e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:58:29, skipping insertion in model container [2022-03-20 18:58:29,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:58:29" (1/1) ... [2022-03-20 18:58:29,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:58:29,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:58:29,520 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c[319,332] [2022-03-20 18:58:29,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:58:29,546 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:58:29,558 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c[319,332] [2022-03-20 18:58:29,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:58:29,571 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:58:29,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:58:29 WrapperNode [2022-03-20 18:58:29,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:58:29,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:58:29,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:58:29,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:58:29,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:58:29" (1/1) ... [2022-03-20 18:58:29,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:58:29" (1/1) ... [2022-03-20 18:58:29,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:58:29" (1/1) ... [2022-03-20 18:58:29,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:58:29" (1/1) ... [2022-03-20 18:58:29,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:58:29" (1/1) ... [2022-03-20 18:58:29,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:58:29" (1/1) ... [2022-03-20 18:58:29,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:58:29" (1/1) ... [2022-03-20 18:58:29,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:58:29,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:58:29,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:58:29,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:58:29,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:58:29" (1/1) ... [2022-03-20 18:58:29,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:58:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:58:29,630 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) [2022-03-20 18:58:29,635 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 [2022-03-20 18:58:29,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:58:29,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:58:29,662 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:58:29,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 18:58:29,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:58:29,662 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:58:29,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:58:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:58:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:58:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:58:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:58:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:58:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:58:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:58:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:58:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:58:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:58:29,711 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:58:29,713 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:58:29,810 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:58:29,815 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:58:29,815 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 18:58:29,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:58:29 BoogieIcfgContainer [2022-03-20 18:58:29,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:58:29,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:58:29,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:58:29,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:58:29,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:58:29" (1/3) ... [2022-03-20 18:58:29,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ec3aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:58:29, skipping insertion in model container [2022-03-20 18:58:29,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:58:29" (2/3) ... [2022-03-20 18:58:29,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ec3aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:58:29, skipping insertion in model container [2022-03-20 18:58:29,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:58:29" (3/3) ... [2022-03-20 18:58:29,826 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2022-03-20 18:58:29,830 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:58:29,831 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:58:29,881 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:58:29,899 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 [2022-03-20 18:58:29,900 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:58:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:58:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 18:58:29,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:58:29,925 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:58:29,925 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:58:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:58:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1104150160, now seen corresponding path program 1 times [2022-03-20 18:58:29,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:58:29,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [591885524] [2022-03-20 18:58:29,974 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:58:29,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1104150160, now seen corresponding path program 2 times [2022-03-20 18:58:29,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:58:29,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467870101] [2022-03-20 18:58:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:58:29,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:58:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:58:30,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:58:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:58:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:58:30,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:58:30,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467870101] [2022-03-20 18:58:30,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467870101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:58:30,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:58:30,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:58:30,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:58:30,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [591885524] [2022-03-20 18:58:30,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [591885524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:58:30,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:58:30,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:58:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137400022] [2022-03-20 18:58:30,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:58:30,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 18:58:30,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:58:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 18:58:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 18:58:30,168 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:58:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:58:30,220 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-03-20 18:58:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 18:58:30,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 18:58:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:58:30,228 INFO L225 Difference]: With dead ends: 36 [2022-03-20 18:58:30,228 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 18:58:30,231 INFO L912 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 [2022-03-20 18:58:30,234 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:58:30,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:58:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 18:58:30,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 18:58:30,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:58:30,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-03-20 18:58:30,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-03-20 18:58:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:58:30,262 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-03-20 18:58:30,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:58:30,262 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-03-20 18:58:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 18:58:30,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:58:30,263 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:58:30,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:58:30,264 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:58:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:58:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1394135754, now seen corresponding path program 1 times [2022-03-20 18:58:30,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:58:30,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [797251163] [2022-03-20 18:58:30,266 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:58:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1394135754, now seen corresponding path program 2 times [2022-03-20 18:58:30,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:58:30,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570851575] [2022-03-20 18:58:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:58:30,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:58:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:58:30,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:58:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:58:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:58:30,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:58:30,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570851575] [2022-03-20 18:58:30,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570851575] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:58:30,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:58:30,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:58:30,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:58:30,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [797251163] [2022-03-20 18:58:30,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [797251163] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:58:30,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:58:30,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:58:30,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565454317] [2022-03-20 18:58:30,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:58:30,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 18:58:30,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:58:30,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 18:58:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 18:58:30,321 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:58:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:58:30,358 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-03-20 18:58:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 18:58:30,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 18:58:30,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:58:30,359 INFO L225 Difference]: With dead ends: 30 [2022-03-20 18:58:30,360 INFO L226 Difference]: Without dead ends: 19 [2022-03-20 18:58:30,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 18:58:30,363 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:58:30,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:58:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-20 18:58:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-20 18:58:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:58:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-03-20 18:58:30,383 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-03-20 18:58:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:58:30,384 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-03-20 18:58:30,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:58:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-03-20 18:58:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 18:58:30,385 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:58:30,385 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:58:30,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 18:58:30,385 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:58:30,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:58:30,386 INFO L85 PathProgramCache]: Analyzing trace with hash 479542393, now seen corresponding path program 1 times [2022-03-20 18:58:30,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:58:30,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233151332] [2022-03-20 18:58:30,500 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:58:30,501 INFO L85 PathProgramCache]: Analyzing trace with hash -697934047, now seen corresponding path program 1 times [2022-03-20 18:58:30,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:58:30,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241890563] [2022-03-20 18:58:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:58:30,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:58:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:58:30,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:58:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:58:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:58:30,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:58:30,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241890563] [2022-03-20 18:58:30,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241890563] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:58:30,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:58:30,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:58:30,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:58:30,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233151332] [2022-03-20 18:58:30,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233151332] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:58:30,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:58:30,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:58:30,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988162894] [2022-03-20 18:58:30,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:58:30,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 18:58:30,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:58:30,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 18:58:30,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 18:58:30,633 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:58:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:58:30,719 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-03-20 18:58:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 18:58:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 18:58:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:58:30,721 INFO L225 Difference]: With dead ends: 32 [2022-03-20 18:58:30,721 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 18:58:30,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-20 18:58:30,727 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:58:30,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:58:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 18:58:30,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 18:58:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:58:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-03-20 18:58:30,743 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2022-03-20 18:58:30,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:58:30,743 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-03-20 18:58:30,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:58:30,743 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-03-20 18:58:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 18:58:30,744 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:58:30,744 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:58:30,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 18:58:30,744 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:58:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:58:30,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1190018304, now seen corresponding path program 1 times [2022-03-20 18:58:30,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:58:30,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1095399286] [2022-03-20 19:01:09,475 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.removeLastColumnRational(QvasrAbstractionJoin.java:428) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.pushout(QvasrAbstractionJoin.java:181) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.join(QvasrAbstractionJoin.java:116) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrSummarizer.summarizeLoop(QvasrSummarizer.java:130) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrLoopSummarization.getQvasrAcceleration(QvasrLoopSummarization.java:87) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorQvasr.accelerateLoop(AcceleratorQvasr.java:91) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:246) 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:595) 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) [2022-03-20 19:01:09,478 INFO L158 Benchmark]: Toolchain (without parser) took 160095.10ms. Allocated memory was 175.1MB in the beginning and 217.1MB in the end (delta: 41.9MB). Free memory was 124.5MB in the beginning and 127.1MB in the end (delta: -2.6MB). Peak memory consumption was 100.5MB. Max. memory is 8.0GB. [2022-03-20 19:01:09,478 INFO L158 Benchmark]: CDTParser took 0.64ms. Allocated memory is still 175.1MB. Free memory was 140.7MB in the beginning and 140.6MB in the end (delta: 136.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 19:01:09,478 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.04ms. Allocated memory was 175.1MB in the beginning and 217.1MB in the end (delta: 41.9MB). Free memory was 124.3MB in the beginning and 193.7MB in the end (delta: -69.3MB). Peak memory consumption was 15.0MB. Max. memory is 8.0GB. [2022-03-20 19:01:09,479 INFO L158 Benchmark]: Boogie Preprocessor took 25.17ms. Allocated memory is still 217.1MB. Free memory was 193.7MB in the beginning and 192.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 19:01:09,479 INFO L158 Benchmark]: RCFGBuilder took 219.04ms. Allocated memory is still 217.1MB. Free memory was 192.2MB in the beginning and 181.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 19:01:09,479 INFO L158 Benchmark]: TraceAbstraction took 159658.49ms. Allocated memory is still 217.1MB. Free memory was 181.2MB in the beginning and 127.1MB in the end (delta: 54.0MB). Peak memory consumption was 114.9MB. Max. memory is 8.0GB. [2022-03-20 19:01:09,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64ms. Allocated memory is still 175.1MB. Free memory was 140.7MB in the beginning and 140.6MB in the end (delta: 136.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 188.04ms. Allocated memory was 175.1MB in the beginning and 217.1MB in the end (delta: 41.9MB). Free memory was 124.3MB in the beginning and 193.7MB in the end (delta: -69.3MB). Peak memory consumption was 15.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.17ms. Allocated memory is still 217.1MB. Free memory was 193.7MB in the beginning and 192.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 219.04ms. Allocated memory is still 217.1MB. Free memory was 192.2MB in the beginning and 181.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 159658.49ms. Allocated memory is still 217.1MB. Free memory was 181.2MB in the beginning and 127.1MB in the end (delta: 54.0MB). Peak memory consumption was 114.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0: de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractionJoin.removeLastColumnRational(QvasrAbstractionJoin.java:428) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-20 19:01:09,500 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...