/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/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:12:21,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:12:21,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:12:21,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:12:21,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:12:21,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:12:21,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:12:21,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:12:21,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:12:21,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:12:21,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:12:21,423 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:12:21,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:12:21,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:12:21,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:12:21,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:12:21,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:12:21,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:12:21,424 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:12:21,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:12:21,424 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:12:21,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:12:21,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:12:21,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:12:21,425 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:12:21,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:12:21,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:12:21,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:12:21,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:12:21,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:12:21,425 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:12:21,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:12:21,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:12:21,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:12:21,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:12:21,637 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:12:21,639 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:12:21,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2022-02-15 01:12:21,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d9193bb/e9f70ac9631c4fe2875f9ef98fa86f2f/FLAG9a8ac78da [2022-02-15 01:12:22,086 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:12:22,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2022-02-15 01:12:22,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d9193bb/e9f70ac9631c4fe2875f9ef98fa86f2f/FLAG9a8ac78da [2022-02-15 01:12:22,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d9193bb/e9f70ac9631c4fe2875f9ef98fa86f2f [2022-02-15 01:12:22,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:12:22,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:12:22,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:12:22,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:12:22,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:12:22,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:12:22" (1/1) ... [2022-02-15 01:12:22,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d82e5ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:22, skipping insertion in model container [2022-02-15 01:12:22,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:12:22" (1/1) ... [2022-02-15 01:12:22,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:12:22,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:12:22,672 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/sum01_bug02_sum01_bug02_base.case.i[834,847] [2022-02-15 01:12:22,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:12:22,688 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:12:22,701 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/sum01_bug02_sum01_bug02_base.case.i[834,847] [2022-02-15 01:12:22,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:12:22,718 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:12:22,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:22 WrapperNode [2022-02-15 01:12:22,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:12:22,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:12:22,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:12:22,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:12:22,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:22" (1/1) ... [2022-02-15 01:12:22,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:22" (1/1) ... [2022-02-15 01:12:22,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:22" (1/1) ... [2022-02-15 01:12:22,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:22" (1/1) ... [2022-02-15 01:12:22,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:22" (1/1) ... [2022-02-15 01:12:22,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:22" (1/1) ... [2022-02-15 01:12:22,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:22" (1/1) ... [2022-02-15 01:12:22,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:12:22,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:12:22,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:12:22,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:12:22,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:22" (1/1) ... [2022-02-15 01:12:22,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:12:22,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:12:22,803 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) [2022-02-15 01:12:22,805 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 [2022-02-15 01:12:22,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:12:22,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:12:22,826 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:12:22,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:12:22,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:12:22,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:12:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:12:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:12:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:12:22,882 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:12:22,883 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:12:22,987 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:12:22,991 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:12:22,992 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 01:12:22,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:12:22 BoogieIcfgContainer [2022-02-15 01:12:23,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:12:23,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:12:23,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:12:23,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:12:23,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:12:22" (1/3) ... [2022-02-15 01:12:23,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecef3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:12:23, skipping insertion in model container [2022-02-15 01:12:23,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:22" (2/3) ... [2022-02-15 01:12:23,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecef3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:12:23, skipping insertion in model container [2022-02-15 01:12:23,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:12:22" (3/3) ... [2022-02-15 01:12:23,019 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2022-02-15 01:12:23,023 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:12:23,023 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:12:23,065 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:12:23,072 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 [2022-02-15 01:12:23,072 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:12:23,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:23,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-15 01:12:23,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:23,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:23,102 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1466806487, now seen corresponding path program 1 times [2022-02-15 01:12:23,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:23,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894888212] [2022-02-15 01:12:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:23,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:23,185 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:23,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:23,323 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:23,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894888212] [2022-02-15 01:12:23,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [894888212] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:23,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:23,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:12:23,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36000156] [2022-02-15 01:12:23,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:23,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:12:23,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:23,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:12:23,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:12:23,357 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:23,395 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-02-15 01:12:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:12:23,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-15 01:12:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:23,407 INFO L225 Difference]: With dead ends: 31 [2022-02-15 01:12:23,408 INFO L226 Difference]: Without dead ends: 14 [2022-02-15 01:12:23,410 INFO L932 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 [2022-02-15 01:12:23,413 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:23,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:12:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-15 01:12:23,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-15 01:12:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-02-15 01:12:23,439 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-02-15 01:12:23,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:23,439 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-02-15 01:12:23,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:23,440 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-02-15 01:12:23,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-15 01:12:23,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:23,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:23,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:12:23,441 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:23,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1456647756, now seen corresponding path program 1 times [2022-02-15 01:12:23,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:23,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662100963] [2022-02-15 01:12:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:23,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:23,446 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:23,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:23,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:23,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662100963] [2022-02-15 01:12:23,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [662100963] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:23,549 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:23,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:12:23,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613910924] [2022-02-15 01:12:23,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:23,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:12:23,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:23,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:12:23,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:12:23,554 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:23,625 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-02-15 01:12:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:12:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-15 01:12:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:23,627 INFO L225 Difference]: With dead ends: 20 [2022-02-15 01:12:23,627 INFO L226 Difference]: Without dead ends: 15 [2022-02-15 01:12:23,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:12:23,631 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:23,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:12:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-15 01:12:23,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-15 01:12:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-02-15 01:12:23,642 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-02-15 01:12:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:23,643 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-02-15 01:12:23,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:23,643 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-02-15 01:12:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:12:23,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:23,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:23,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:12:23,645 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:23,647 INFO L85 PathProgramCache]: Analyzing trace with hash 193151625, now seen corresponding path program 1 times [2022-02-15 01:12:23,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:23,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208204362] [2022-02-15 01:12:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:23,826 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:23,826 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:23,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:23,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:23,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:23,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208204362] [2022-02-15 01:12:23,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [208204362] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:23,947 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:23,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:12:23,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440971718] [2022-02-15 01:12:23,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:23,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:12:23,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:23,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:12:23,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:12:23,949 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2022-02-15 01:12:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:24,004 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-02-15 01:12:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:12:24,004 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 [2022-02-15 01:12:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:24,005 INFO L225 Difference]: With dead ends: 25 [2022-02-15 01:12:24,005 INFO L226 Difference]: Without dead ends: 17 [2022-02-15 01:12:24,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:12:24,006 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:24,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:12:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-15 01:12:24,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-02-15 01:12:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-02-15 01:12:24,009 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2022-02-15 01:12:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:24,009 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-02-15 01:12:24,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2022-02-15 01:12:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-02-15 01:12:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:12:24,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:24,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:24,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:12:24,010 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:24,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:24,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1968158987, now seen corresponding path program 1 times [2022-02-15 01:12:24,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:24,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076789742] [2022-02-15 01:12:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:24,120 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:24,120 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:24,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:24,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:24,355 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:24,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076789742] [2022-02-15 01:12:24,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076789742] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:24,356 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:24,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:12:24,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519152911] [2022-02-15 01:12:24,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:24,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:12:24,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:24,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:12:24,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:12:24,357 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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) [2022-02-15 01:12:24,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:24,614 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-02-15 01:12:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:12:24,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 [2022-02-15 01:12:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:24,615 INFO L225 Difference]: With dead ends: 24 [2022-02-15 01:12:24,615 INFO L226 Difference]: Without dead ends: 19 [2022-02-15 01:12:24,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:12:24,617 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:24,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 46 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-15 01:12:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-02-15 01:12:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-02-15 01:12:24,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2022-02-15 01:12:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:24,621 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-02-15 01:12:24,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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) [2022-02-15 01:12:24,621 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-02-15 01:12:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:12:24,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:24,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:24,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:12:24,622 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:24,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:24,622 INFO L85 PathProgramCache]: Analyzing trace with hash 80268138, now seen corresponding path program 1 times [2022-02-15 01:12:24,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:24,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529811297] [2022-02-15 01:12:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:24,715 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:24,716 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:24,773 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:24,828 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:24,828 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:24,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 01:12:24,842 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-15 01:12:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 01:12:24,869 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-15 01:12:24,869 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-15 01:12:24,870 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 01:12:24,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:12:24,874 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-02-15 01:12:24,875 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 01:12:24,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:12:24 BoogieIcfgContainer [2022-02-15 01:12:24,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 01:12:24,883 INFO L158 Benchmark]: Toolchain (without parser) took 2365.81ms. Allocated memory was 205.5MB in the beginning and 271.6MB in the end (delta: 66.1MB). Free memory was 156.6MB in the beginning and 222.3MB in the end (delta: -65.7MB). Peak memory consumption was 2.5MB. Max. memory is 8.0GB. [2022-02-15 01:12:24,883 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 205.5MB. Free memory is still 173.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 01:12:24,883 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.70ms. Allocated memory is still 205.5MB. Free memory was 156.5MB in the beginning and 182.5MB in the end (delta: -26.0MB). Peak memory consumption was 12.0MB. Max. memory is 8.0GB. [2022-02-15 01:12:24,883 INFO L158 Benchmark]: Boogie Preprocessor took 35.06ms. Allocated memory is still 205.5MB. Free memory was 181.9MB in the beginning and 180.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 01:12:24,883 INFO L158 Benchmark]: RCFGBuilder took 243.57ms. Allocated memory is still 205.5MB. Free memory was 180.9MB in the beginning and 170.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-15 01:12:24,884 INFO L158 Benchmark]: TraceAbstraction took 1881.44ms. Allocated memory was 205.5MB in the beginning and 271.6MB in the end (delta: 66.1MB). Free memory was 170.4MB in the beginning and 222.3MB in the end (delta: -51.9MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-02-15 01:12:24,885 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 205.5MB. Free memory is still 173.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 183.70ms. Allocated memory is still 205.5MB. Free memory was 156.5MB in the beginning and 182.5MB in the end (delta: -26.0MB). Peak memory consumption was 12.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.06ms. Allocated memory is still 205.5MB. Free memory was 181.9MB in the beginning and 180.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 243.57ms. Allocated memory is still 205.5MB. Free memory was 180.9MB in the beginning and 170.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1881.44ms. Allocated memory was 205.5MB in the beginning and 271.6MB in the end (delta: 66.1MB). Free memory was 170.4MB in the beginning and 222.3MB in the end (delta: -51.9MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND TRUE i==4 [L26] sn=-10 [L24] i++ [L24] COND FALSE !(i<=n) [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.8s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 53 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52 mSDsluCounter, 132 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 79 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 160 IncrementalHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 53 mSDtfsCounter, 160 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-15 01:12:24,910 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...