/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/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:12:21,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:12:21,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:12:21,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:12:21,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:12:21,690 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:12:21,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:12:21,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:12:21,692 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:12:21,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:12:21,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:12:21,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:12:21,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:12:21,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:12:21,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:12:21,693 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:12:21,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:12:21,693 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:12:21,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:12:21,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:12:21,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:12:21,694 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:12:21,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:12:21,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:12:21,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:12:21,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:12:21,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:12:21,707 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:12:21,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:12:21,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:12:21,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:12:21,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:12:21,931 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:12:21,933 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:12:21,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2022-02-24 01:12:22,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22a48347/0a2e0d54ffac416eac48fe7ce6328917/FLAG68b2928c8 [2022-02-24 01:12:22,340 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:12:22,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2022-02-24 01:12:22,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22a48347/0a2e0d54ffac416eac48fe7ce6328917/FLAG68b2928c8 [2022-02-24 01:12:22,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e22a48347/0a2e0d54ffac416eac48fe7ce6328917 [2022-02-24 01:12:22,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:12:22,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:12:22,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:12:22,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:12:22,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:12:22,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60433e81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22, skipping insertion in model container [2022-02-24 01:12:22,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:12:22,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:12:22,473 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/linear_search.c[383,396] [2022-02-24 01:12:22,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:12:22,505 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:12:22,512 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/linear_search.c[383,396] [2022-02-24 01:12:22,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:12:22,525 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:12:22,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22 WrapperNode [2022-02-24 01:12:22,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:12:22,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:12:22,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:12:22,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:12:22,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:12:22,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:12:22,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:12:22,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:12:22,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (1/1) ... [2022-02-24 01:12:22,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:12:22,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:12:22,592 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) [2022-02-24 01:12:22,623 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 [2022-02-24 01:12:22,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:12:22,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:12:22,636 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:12:22,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:12:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2022-02-24 01:12:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:12:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-02-24 01:12:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:12:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:12:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:12:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:12:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-02-24 01:12:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:12:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 01:12:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2022-02-24 01:12:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:12:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:12:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-02-24 01:12:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-02-24 01:12:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:12:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:12:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:12:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:12:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:12:22,694 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:12:22,695 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:12:24,909 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:12:24,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:12:24,917 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 01:12:24,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:12:24 BoogieIcfgContainer [2022-02-24 01:12:24,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:12:24,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:12:24,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:12:24,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:12:24,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:12:22" (1/3) ... [2022-02-24 01:12:24,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d22f14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:12:24, skipping insertion in model container [2022-02-24 01:12:24,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:22" (2/3) ... [2022-02-24 01:12:24,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d22f14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:12:24, skipping insertion in model container [2022-02-24 01:12:24,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:12:24" (3/3) ... [2022-02-24 01:12:24,926 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_search.c [2022-02-24 01:12:24,930 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:12:24,930 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:12:24,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:12:24,969 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=JORDAN [2022-02-24 01:12:24,969 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:12:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 01:12:24,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:24,986 INFO L514 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] [2022-02-24 01:12:24,987 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:24,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1001129449, now seen corresponding path program 1 times [2022-02-24 01:12:24,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:24,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517114997] [2022-02-24 01:12:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:25,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:25,060 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:12:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-24 01:12:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:12:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:25,307 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:25,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517114997] [2022-02-24 01:12:25,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1517114997] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:25,309 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:25,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:12:25,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086196081] [2022-02-24 01:12:25,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:25,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:12:25,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:25,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:12:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:12:25,339 INFO L87 Difference]: Start difference. First operand has 34 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:12:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:25,453 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-02-24 01:12:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:12:25,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-02-24 01:12:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:25,461 INFO L225 Difference]: With dead ends: 52 [2022-02-24 01:12:25,462 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 01:12:25,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:12:25,467 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:25,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 01:12:25,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 01:12:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-02-24 01:12:25,494 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-02-24 01:12:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:25,494 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-02-24 01:12:25,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:12:25,495 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-02-24 01:12:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:12:25,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:25,495 INFO L514 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, 1, 1] [2022-02-24 01:12:25,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:12:25,496 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2092261110, now seen corresponding path program 1 times [2022-02-24 01:12:25,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:25,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338616615] [2022-02-24 01:12:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:25,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:25,512 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:12:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-24 01:12:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:12:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:25,682 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:25,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338616615] [2022-02-24 01:12:25,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [338616615] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:25,683 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:25,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:25,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950814620] [2022-02-24 01:12:25,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:25,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:25,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:25,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:25,685 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:12:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:25,846 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-02-24 01:12:25,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:12:25,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-02-24 01:12:25,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:25,847 INFO L225 Difference]: With dead ends: 35 [2022-02-24 01:12:25,847 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 01:12:25,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:12:25,849 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:25,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 50 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 01:12:25,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 01:12:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-02-24 01:12:25,854 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2022-02-24 01:12:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:25,854 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-02-24 01:12:25,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 01:12:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-02-24 01:12:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:12:25,855 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:25,855 INFO L514 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, 1, 1] [2022-02-24 01:12:25,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:12:25,856 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash -349450775, now seen corresponding path program 1 times [2022-02-24 01:12:25,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:25,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119146988] [2022-02-24 01:12:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:25,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:25,858 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:12:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-24 01:12:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-24 01:12:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:26,141 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:26,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119146988] [2022-02-24 01:12:26,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [119146988] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:26,141 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:26,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:26,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082727722] [2022-02-24 01:12:26,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:26,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:26,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:26,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:26,143 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 01:12:28,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-02-24 01:12:28,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:28,652 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-02-24 01:12:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:12:28,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-02-24 01:12:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:28,653 INFO L225 Difference]: With dead ends: 40 [2022-02-24 01:12:28,653 INFO L226 Difference]: Without dead ends: 31 [2022-02-24 01:12:28,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:28,655 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:28,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 38 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 89 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 01:12:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-24 01:12:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-02-24 01:12:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-02-24 01:12:28,667 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2022-02-24 01:12:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:28,667 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-02-24 01:12:28,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 01:12:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-24 01:12:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 01:12:28,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:28,669 INFO L514 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, 1, 1, 1, 1] [2022-02-24 01:12:28,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:12:28,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash 33102019, now seen corresponding path program 1 times [2022-02-24 01:12:28,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:28,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892385212] [2022-02-24 01:12:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:28,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:28,932 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-24 01:12:28,933 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 01:12:28,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:12:28,945 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:91) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolantsCraigNested(Interpolator.java:170) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolants(Interpolator.java:126) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:297) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:185) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:216) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) 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) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms at de.uni_freiburg.informatik.ultimate.logic.NoopScript.annotate(NoopScript.java:471) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.annotate(WrapperScript.java:282) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.annotate(WrapperScript.java:282) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAssertCodeBlocks.annotateAndAssertTerm(AnnotateAndAssertCodeBlocks.java:192) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAssertCodeBlocks.annotateAndAssertNonCall(AnnotateAndAssertCodeBlocks.java:109) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserter.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserter.java:101) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:313) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:211) ... 34 more [2022-02-24 01:12:28,950 INFO L158 Benchmark]: Toolchain (without parser) took 6591.60ms. Allocated memory was 197.1MB in the beginning and 237.0MB in the end (delta: 39.8MB). Free memory was 146.2MB in the beginning and 203.9MB in the end (delta: -57.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 01:12:28,952 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory was 162.9MB in the beginning and 162.8MB in the end (delta: 68.7kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 01:12:28,952 INFO L158 Benchmark]: CACSL2BoogieTranslator took 166.47ms. Allocated memory was 197.1MB in the beginning and 237.0MB in the end (delta: 39.8MB). Free memory was 146.0MB in the beginning and 214.1MB in the end (delta: -68.1MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-02-24 01:12:28,953 INFO L158 Benchmark]: Boogie Preprocessor took 38.27ms. Allocated memory is still 237.0MB. Free memory was 214.1MB in the beginning and 212.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 01:12:28,953 INFO L158 Benchmark]: RCFGBuilder took 2353.40ms. Allocated memory is still 237.0MB. Free memory was 212.7MB in the beginning and 200.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-24 01:12:28,953 INFO L158 Benchmark]: TraceAbstraction took 4027.54ms. Allocated memory is still 237.0MB. Free memory was 200.1MB in the beginning and 203.9MB in the end (delta: -3.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 01:12:28,954 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory was 162.9MB in the beginning and 162.8MB in the end (delta: 68.7kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 166.47ms. Allocated memory was 197.1MB in the beginning and 237.0MB in the end (delta: 39.8MB). Free memory was 146.0MB in the beginning and 214.1MB in the end (delta: -68.1MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.27ms. Allocated memory is still 237.0MB. Free memory was 214.1MB in the beginning and 212.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 2353.40ms. Allocated memory is still 237.0MB. Free memory was 212.7MB in the beginning and 200.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 4027.54ms. Allocated memory is still 237.0MB. Free memory was 200.1MB in the beginning and 203.9MB in the end (delta: -3.8MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-02-24 01:12:28,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...