/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 04:09:52,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:09:52,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:09:52,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 04:09:52,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 04:09:52,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 04:09:52,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 04:09:52,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 04:09:52,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 04:09:52,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 04:09:52,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 04:09:53,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 04:09:53,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 04:09:53,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 04:09:53,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 04:09:53,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 04:09:53,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 04:09:53,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:09:53,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:09:53,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:09:53,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:09:53,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:09:53,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:09:53,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:09:53,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:09:53,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:09:53,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:09:53,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:09:53,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:09:53,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:09:53,017 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:09:53,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:09:53,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:09:53,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:09:53,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:09:53,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:09:53,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:09:53,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:09:53,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:09:53,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:09:53,018 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:09:53,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:09:53,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:09:53,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:09:53,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:09:53,232 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:09:53,232 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:09:53,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c [2022-02-24 04:09:53,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c13371d2d/e9d3a7c076ab471ba5f9878c48e0f317/FLAG3a3d65069 [2022-02-24 04:09:53,647 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:09:53,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c [2022-02-24 04:09:53,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c13371d2d/e9d3a7c076ab471ba5f9878c48e0f317/FLAG3a3d65069 [2022-02-24 04:09:53,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c13371d2d/e9d3a7c076ab471ba5f9878c48e0f317 [2022-02-24 04:09:53,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:09:53,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:09:53,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:09:53,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:09:53,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:09:53,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:09:53" (1/1) ... [2022-02-24 04:09:53,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12cae766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:09:53, skipping insertion in model container [2022-02-24 04:09:53,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:09:53" (1/1) ... [2022-02-24 04:09:53,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:09:53,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:09:53,842 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c[525,538] [2022-02-24 04:09:53,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:09:53,864 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:09:53,871 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c[525,538] [2022-02-24 04:09:53,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:09:53,912 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:09:53,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:09:53 WrapperNode [2022-02-24 04:09:53,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:09:53,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:09:53,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:09:53,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:09:53,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:09:53" (1/1) ... [2022-02-24 04:09:53,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:09:53" (1/1) ... [2022-02-24 04:09:53,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:09:53" (1/1) ... [2022-02-24 04:09:53,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:09:53" (1/1) ... [2022-02-24 04:09:53,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:09:53" (1/1) ... [2022-02-24 04:09:53,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:09:53" (1/1) ... [2022-02-24 04:09:53,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:09:53" (1/1) ... [2022-02-24 04:09:53,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:09:53,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:09:53,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:09:53,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:09:53,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:09:53" (1/1) ... [2022-02-24 04:09:53,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:09:53,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:09:53,978 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 04:09:53,984 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 04:09:54,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:09:54,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:09:54,012 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:09:54,012 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 04:09:54,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 04:09:54,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:09:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:09:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:09:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:09:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:09:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 04:09:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 04:09:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 04:09:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:09:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:09:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:09:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:09:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:09:54,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:09:54,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:09:54,077 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:09:54,078 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:09:54,236 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:09:54,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:09:54,240 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 04:09:54,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:09:54 BoogieIcfgContainer [2022-02-24 04:09:54,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:09:54,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:09:54,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:09:54,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:09:54,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:09:53" (1/3) ... [2022-02-24 04:09:54,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a58bf28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:09:54, skipping insertion in model container [2022-02-24 04:09:54,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:09:53" (2/3) ... [2022-02-24 04:09:54,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a58bf28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:09:54, skipping insertion in model container [2022-02-24 04:09:54,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:09:54" (3/3) ... [2022-02-24 04:09:54,247 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound2.c [2022-02-24 04:09:54,251 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:09:54,251 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:09:54,291 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:09:54,297 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=QVASR [2022-02-24 04:09:54,297 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:09:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-24 04:09:54,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 04:09:54,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:09:54,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:09:54,313 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:09:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:09:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2022-02-24 04:09:54,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:09:54,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294296541] [2022-02-24 04:09:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:09:54,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:09:54,368 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:09:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:54,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:09:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:54,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:09:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:54,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:09:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 04:09:54,477 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:09:54,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294296541] [2022-02-24 04:09:54,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [294296541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:09:54,478 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:09:54,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 04:09:54,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384223153] [2022-02-24 04:09:54,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:09:54,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 04:09:54,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:09:54,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 04:09:54,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 04:09:54,506 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 04:09:56,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:09:58,909 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:09:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:09:58,919 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2022-02-24 04:09:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 04:09:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-24 04:09:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:09:58,926 INFO L225 Difference]: With dead ends: 69 [2022-02-24 04:09:58,926 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 04:09:58,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 04:09:58,930 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-24 04:09:58,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 10 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-02-24 04:09:58,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 04:09:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-24 04:09:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-24 04:09:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-02-24 04:09:58,962 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-02-24 04:09:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:09:58,962 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-02-24 04:09:58,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 04:09:58,962 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-02-24 04:09:58,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 04:09:58,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:09:58,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:09:58,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:09:58,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:09:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:09:58,964 INFO L85 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2022-02-24 04:09:58,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:09:58,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207526482] [2022-02-24 04:09:58,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:09:58,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:09:58,967 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:09:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:59,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:09:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:59,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:09:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:59,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:09:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:09:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 04:09:59,217 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:09:59,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207526482] [2022-02-24 04:09:59,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1207526482] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:09:59,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:09:59,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 04:09:59,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42919505] [2022-02-24 04:09:59,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:09:59,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 04:09:59,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:09:59,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 04:09:59,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 04:09:59,219 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:10:01,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:03,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:07,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 04:10:09,366 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 04:10:11,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 04:10:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:10:12,059 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2022-02-24 04:10:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 04:10:12,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-02-24 04:10:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:10:12,061 INFO L225 Difference]: With dead ends: 68 [2022-02-24 04:10:12,061 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 04:10:12,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 04:10:12,063 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 49 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-02-24 04:10:12,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 62 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 200 Invalid, 5 Unknown, 0 Unchecked, 12.7s Time] [2022-02-24 04:10:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 04:10:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-24 04:10:12,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 04:10:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-02-24 04:10:12,078 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-02-24 04:10:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:10:12,078 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-02-24 04:10:12,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:10:12,078 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-02-24 04:10:12,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 04:10:12,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:10:12,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:10:12,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:10:12,079 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:10:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:10:12,080 INFO L85 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2022-02-24 04:10:12,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:10:12,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748809516] [2022-02-24 04:10:12,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:10:12,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:10:12,081 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:10:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:12,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:10:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:12,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:10:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:12,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:10:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 04:10:12,293 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:10:12,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748809516] [2022-02-24 04:10:12,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748809516] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:10:12,293 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:10:12,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 04:10:12,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888202216] [2022-02-24 04:10:12,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:10:12,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 04:10:12,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:10:12,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 04:10:12,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 04:10:12,295 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:10:15,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 04:10:17,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:19,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:21,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:24,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:26,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:10:27,696 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2022-02-24 04:10:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 04:10:27,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-02-24 04:10:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:10:27,698 INFO L225 Difference]: With dead ends: 67 [2022-02-24 04:10:27,698 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 04:10:27,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-24 04:10:27,699 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 86 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:10:27,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 60 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 228 Invalid, 5 Unknown, 0 Unchecked, 15.2s Time] [2022-02-24 04:10:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 04:10:27,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-02-24 04:10:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-24 04:10:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2022-02-24 04:10:27,716 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 26 [2022-02-24 04:10:27,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:10:27,717 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2022-02-24 04:10:27,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:10:27,717 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2022-02-24 04:10:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:10:27,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:10:27,718 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:10:27,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:10:27,718 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:10:27,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:10:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash -148039962, now seen corresponding path program 2 times [2022-02-24 04:10:27,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:10:27,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500209072] [2022-02-24 04:10:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:10:27,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:10:27,720 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:10:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:27,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:10:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:27,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:10:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:27,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:10:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 04:10:27,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:10:27,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500209072] [2022-02-24 04:10:27,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [500209072] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:10:27,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:10:27,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 04:10:27,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480766746] [2022-02-24 04:10:27,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:10:27,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 04:10:27,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:10:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 04:10:27,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-24 04:10:27,952 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:10:31,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 04:10:38,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:41,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:43,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:45,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 04:10:47,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 04:10:49,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:51,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:53,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:10:54,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:10:54,228 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2022-02-24 04:10:54,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 04:10:54,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-02-24 04:10:54,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:10:54,230 INFO L225 Difference]: With dead ends: 85 [2022-02-24 04:10:54,230 INFO L226 Difference]: Without dead ends: 78 [2022-02-24 04:10:54,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-02-24 04:10:54,231 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 43 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 105 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2022-02-24 04:10:54,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 79 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 359 Invalid, 9 Unknown, 0 Unchecked, 26.0s Time] [2022-02-24 04:10:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-24 04:10:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-02-24 04:10:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 32 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-24 04:10:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 104 transitions. [2022-02-24 04:10:54,251 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 104 transitions. Word has length 28 [2022-02-24 04:10:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:10:54,252 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 104 transitions. [2022-02-24 04:10:54,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:10:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 104 transitions. [2022-02-24 04:10:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:10:54,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:10:54,253 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:10:54,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:10:54,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:10:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:10:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash -79413119, now seen corresponding path program 3 times [2022-02-24 04:10:54,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:10:54,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202930408] [2022-02-24 04:10:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:10:54,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:10:54,261 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:10:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:54,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:10:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:54,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 04:10:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:54,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-24 04:10:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:10:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 04:10:54,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:10:54,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202930408] [2022-02-24 04:10:54,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [202930408] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:10:54,548 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:10:54,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 04:10:54,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420448361] [2022-02-24 04:10:54,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:10:54,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 04:10:54,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:10:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 04:10:54,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-24 04:10:54,549 INFO L87 Difference]: Start difference. First operand 75 states and 104 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:11:03,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 04:11:06,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 04:11:08,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-24 04:11:10,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:11:12,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:11:14,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 04:11:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:11:16,926 INFO L93 Difference]: Finished difference Result 101 states and 142 transitions. [2022-02-24 04:11:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 04:11:16,928 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-02-24 04:11:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:11:16,929 INFO L225 Difference]: With dead ends: 101 [2022-02-24 04:11:16,929 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 04:11:16,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-02-24 04:11:16,930 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 50 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 139 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:11:16,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 86 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 515 Invalid, 6 Unknown, 0 Unchecked, 22.2s Time] [2022-02-24 04:11:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 04:11:16,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2022-02-24 04:11:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 32 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-24 04:11:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 107 transitions. [2022-02-24 04:11:16,945 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 107 transitions. Word has length 30 [2022-02-24 04:11:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:11:16,945 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 107 transitions. [2022-02-24 04:11:16,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-24 04:11:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 107 transitions. [2022-02-24 04:11:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 04:11:16,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:11:16,946 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:11:16,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 04:11:16,946 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:11:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:11:16,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2000886032, now seen corresponding path program 1 times [2022-02-24 04:11:16,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:11:16,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121952735] [2022-02-24 04:11:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:11:16,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:11:16,948 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:11:16,960 WARN L132 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-02-24 04:11:16,960 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-02-24 04:11:16,966 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 04:11:16,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 04:11:16,970 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-02-24 04:11:16,972 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 04:11:16,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:11:16 BoogieIcfgContainer [2022-02-24 04:11:16,981 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 04:11:16,981 INFO L158 Benchmark]: Toolchain (without parser) took 83314.17ms. Allocated memory was 187.7MB in the beginning and 290.5MB in the end (delta: 102.8MB). Free memory was 135.4MB in the beginning and 140.2MB in the end (delta: -4.8MB). Peak memory consumption was 98.0MB. Max. memory is 8.0GB. [2022-02-24 04:11:16,981 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 187.7MB. Free memory is still 151.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 04:11:16,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.81ms. Allocated memory was 187.7MB in the beginning and 290.5MB in the end (delta: 102.8MB). Free memory was 135.3MB in the beginning and 261.8MB in the end (delta: -126.6MB). Peak memory consumption was 7.8MB. Max. memory is 8.0GB. [2022-02-24 04:11:16,982 INFO L158 Benchmark]: Boogie Preprocessor took 29.02ms. Allocated memory is still 290.5MB. Free memory was 261.8MB in the beginning and 260.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 04:11:16,982 INFO L158 Benchmark]: RCFGBuilder took 298.14ms. Allocated memory is still 290.5MB. Free memory was 260.3MB in the beginning and 248.2MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-24 04:11:16,982 INFO L158 Benchmark]: TraceAbstraction took 82738.46ms. Allocated memory is still 290.5MB. Free memory was 247.3MB in the beginning and 140.2MB in the end (delta: 107.1MB). Peak memory consumption was 108.0MB. Max. memory is 8.0GB. [2022-02-24 04:11:16,984 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 187.7MB. Free memory is still 151.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 244.81ms. Allocated memory was 187.7MB in the beginning and 290.5MB in the end (delta: 102.8MB). Free memory was 135.3MB in the beginning and 261.8MB in the end (delta: -126.6MB). Peak memory consumption was 7.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.02ms. Allocated memory is still 290.5MB. Free memory was 261.8MB in the beginning and 260.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 298.14ms. Allocated memory is still 290.5MB. Free memory was 260.3MB in the beginning and 248.2MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 82738.46ms. Allocated memory is still 290.5MB. Free memory was 247.3MB in the beginning and 140.2MB in the end (delta: 107.1MB). Peak memory consumption was 108.0MB. 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 - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] unsigned int n, p, q, r, h; [L22] n = __VERIFIER_nondet_uint() [L23] CALL assume_abort_if_not(n>=0 && n<=2) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n>=0 && n<=2) [L24] CALL assume_abort_if_not(n < 4294967295 / 4) [L9] COND FALSE !(!cond) [L24] RET assume_abort_if_not(n < 4294967295 / 4) [L26] p = 0 [L27] q = 1 [L28] r = n [L29] h = 0 [L30] COND TRUE 1 [L31] COND TRUE !(q <= n) [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(r < 2 * p + q) [L12] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(r < 2 * p + q) [L40] CALL __VERIFIER_assert(p*p + r*q == n*q) [L12] COND FALSE !(!(cond)) [L40] RET __VERIFIER_assert(p*p + r*q == n*q) [L41] CALL __VERIFIER_assert(h * h * h - 12 * h * n * q + 16 * n * p * q - h * q * q - 4 * p * q * q + 12 * h * q * r - 16 * p * q * r == 0) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 82.7s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 81.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 27 mSolverCounterUnknown, 234 SdHoareTripleChecker+Valid, 80.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 190 mSDsluCounter, 329 SdHoareTripleChecker+Invalid, 79.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 135 mSDsCounter, 393 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1312 IncrementalHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 393 mSolverCounterUnsat, 194 mSDtfsCounter, 1312 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=5, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 19 StatesRemovedByMinimization, 3 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 could not prove your program: unable to determine feasibility of some traces [2022-02-24 04:11:17,011 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...