/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/loop-industry-pattern/mod3.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 14:48:53,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:48:53,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:48:53,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 14:48:53,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 14:48:53,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 14:48:53,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 14:48:53,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 14:48:53,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:48:53,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:48:53,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:48:53,710 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:48:53,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:48:53,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:48:53,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:48:53,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:48:53,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:48:53,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:48:53,710 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:48:53,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:48:53,711 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:48:53,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:48:53,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:48:53,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:48:53,712 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:48:53,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:48:53,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:48:53,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:48:53,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:48:53,713 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:48:53,713 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:48:53,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:48:53,713 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:48:53,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:48:53,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:48:53,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:48:53,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:48:53,887 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:48:53,889 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:48:53,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c [2022-04-06 14:48:53,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d2ae6a7d/b60692b53f7a4b90970e0592b26ae24d/FLAG83b64cfc9 [2022-04-06 14:48:54,274 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:48:54,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c [2022-04-06 14:48:54,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d2ae6a7d/b60692b53f7a4b90970e0592b26ae24d/FLAG83b64cfc9 [2022-04-06 14:48:54,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d2ae6a7d/b60692b53f7a4b90970e0592b26ae24d [2022-04-06 14:48:54,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:48:54,297 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:48:54,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:48:54,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:48:54,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:48:54,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:48:54" (1/1) ... [2022-04-06 14:48:54,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac68769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:54, skipping insertion in model container [2022-04-06 14:48:54,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:48:54" (1/1) ... [2022-04-06 14:48:54,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:48:54,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:48:54,437 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c[1250,1263] [2022-04-06 14:48:54,444 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:48:54,449 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:48:54,471 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+cfa-reducer.c[1250,1263] [2022-04-06 14:48:54,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:48:54,479 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:48:54,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:54 WrapperNode [2022-04-06 14:48:54,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:48:54,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:48:54,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:48:54,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:48:54,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:54" (1/1) ... [2022-04-06 14:48:54,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:54" (1/1) ... [2022-04-06 14:48:54,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:54" (1/1) ... [2022-04-06 14:48:54,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:54" (1/1) ... [2022-04-06 14:48:54,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:54" (1/1) ... [2022-04-06 14:48:54,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:54" (1/1) ... [2022-04-06 14:48:54,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:54" (1/1) ... [2022-04-06 14:48:54,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:48:54,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:48:54,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:48:54,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:48:54,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:54" (1/1) ... [2022-04-06 14:48:54,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:48:54,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:54,520 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) [2022-04-06 14:48:54,521 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 [2022-04-06 14:48:54,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:48:54,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:48:54,545 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:48:54,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:48:54,545 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:48:54,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:48:54,545 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:48:54,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:48:54,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 14:48:54,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:48:54,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:48:54,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:48:54,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:48:54,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:48:54,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:48:54,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:48:54,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:48:54,589 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:48:54,591 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:48:59,035 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:48:59,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:48:59,039 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-04-06 14:48:59,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:48:59 BoogieIcfgContainer [2022-04-06 14:48:59,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:48:59,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:48:59,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:48:59,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:48:59,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:48:54" (1/3) ... [2022-04-06 14:48:59,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a2ab68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:48:59, skipping insertion in model container [2022-04-06 14:48:59,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:54" (2/3) ... [2022-04-06 14:48:59,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a2ab68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:48:59, skipping insertion in model container [2022-04-06 14:48:59,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:48:59" (3/3) ... [2022-04-06 14:48:59,046 INFO L111 eAbstractionObserver]: Analyzing ICFG mod3.c.v+cfa-reducer.c [2022-04-06 14:48:59,049 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:48:59,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:48:59,076 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:48:59,081 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 [2022-04-06 14:48:59,081 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:48:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 14:48:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 14:48:59,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:59,099 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:59,099 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1410293457, now seen corresponding path program 1 times [2022-04-06 14:48:59,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:59,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [256829364] [2022-04-06 14:48:59,127 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:59,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1410293457, now seen corresponding path program 2 times [2022-04-06 14:48:59,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:59,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583737290] [2022-04-06 14:48:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:59,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:59,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:59,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:59,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583737290] [2022-04-06 14:48:59,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583737290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:59,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:59,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:48:59,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:59,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [256829364] [2022-04-06 14:48:59,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [256829364] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:59,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:59,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:48:59,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478143678] [2022-04-06 14:48:59,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:59,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:48:59,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:59,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:48:59,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 14:48:59,329 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:49:01,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 14:49:03,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 14:49:05,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 14:49:07,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 14:49:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:49:08,095 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-04-06 14:49:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:49:08,099 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 14:49:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:49:08,104 INFO L225 Difference]: With dead ends: 36 [2022-04-06 14:49:08,104 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 14:49:08,105 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 [2022-04-06 14:49:08,108 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:49:08,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 31 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 8.7s Time] [2022-04-06 14:49:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 14:49:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-04-06 14:49:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:49:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-04-06 14:49:08,131 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-04-06 14:49:08,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:49:08,131 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-04-06 14:49:08,131 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:49:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-04-06 14:49:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 14:49:08,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:49:08,132 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:49:08,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:49:08,132 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:49:08,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:49:08,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1346650520, now seen corresponding path program 1 times [2022-04-06 14:49:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:49:08,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1229833019] [2022-04-06 14:49:08,134 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:49:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1346650520, now seen corresponding path program 2 times [2022-04-06 14:49:08,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:49:08,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824905980] [2022-04-06 14:49:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:49:08,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:49:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:49:08,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:49:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:49:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:49:08,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:49:08,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824905980] [2022-04-06 14:49:08,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824905980] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:49:08,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390593719] [2022-04-06 14:49:08,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:49:08,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:49:08,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:49:08,434 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) [2022-04-06 14:49:08,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process