/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/bor2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 23:06:50,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 23:06:50,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 23:06:50,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 23:06:50,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 23:06:50,314 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 23:06:50,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 23:06:50,314 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 23:06:50,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 23:06:50,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 23:06:50,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 23:06:50,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 23:06:50,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 23:06:50,322 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 23:06:50,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 23:06:50,323 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 23:06:50,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 23:06:50,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 23:06:50,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 23:06:50,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 23:06:50,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 23:06:50,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 23:06:50,324 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 23:06:50,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 23:06:50,324 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 23:06:50,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 23:06:50,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 23:06:50,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 23:06:50,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 23:06:50,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:06:50,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 23:06:50,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 23:06:50,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 23:06:50,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 23:06:50,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 23:06:50,326 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 23:06:50,326 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 23:06:50,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 23:06:50,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 23:06:50,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 23:06:50,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 23:06:50,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 23:06:50,566 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 23:06:50,566 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 23:06:50,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor2.i [2022-01-30 23:06:50,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fa484beb/4d8af59c03e34624bdd174955610927e/FLAGa25503b5d [2022-01-30 23:06:51,004 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 23:06:51,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor2.i [2022-01-30 23:06:51,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fa484beb/4d8af59c03e34624bdd174955610927e/FLAGa25503b5d [2022-01-30 23:06:51,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fa484beb/4d8af59c03e34624bdd174955610927e [2022-01-30 23:06:51,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 23:06:51,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 23:06:51,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 23:06:51,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 23:06:51,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 23:06:51,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:06:51" (1/1) ... [2022-01-30 23:06:51,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633f20e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:06:51, skipping insertion in model container [2022-01-30 23:06:51,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 11:06:51" (1/1) ... [2022-01-30 23:06:51,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 23:06:51,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 23:06:51,228 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor2.i[1291,1304] [2022-01-30 23:06:51,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:06:51,235 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 23:06:51,247 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor2.i[1291,1304] [2022-01-30 23:06:51,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 23:06:51,256 INFO L208 MainTranslator]: Completed translation [2022-01-30 23:06:51,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:06:51 WrapperNode [2022-01-30 23:06:51,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 23:06:51,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 23:06:51,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 23:06:51,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 23:06:51,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:06:51" (1/1) ... [2022-01-30 23:06:51,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:06:51" (1/1) ... [2022-01-30 23:06:51,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:06:51" (1/1) ... [2022-01-30 23:06:51,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:06:51" (1/1) ... [2022-01-30 23:06:51,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:06:51" (1/1) ... [2022-01-30 23:06:51,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:06:51" (1/1) ... [2022-01-30 23:06:51,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:06:51" (1/1) ... [2022-01-30 23:06:51,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 23:06:51,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 23:06:51,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 23:06:51,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 23:06:51,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:06:51" (1/1) ... [2022-01-30 23:06:51,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 23:06:51,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:06:51,307 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) [2022-01-30 23:06:51,323 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 [2022-01-30 23:06:51,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 23:06:51,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 23:06:51,336 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 23:06:51,336 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-01-30 23:06:51,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 23:06:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 23:06:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 23:06:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 23:06:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 23:06:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 23:06:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 23:06:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 23:06:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-01-30 23:06:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 23:06:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 23:06:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 23:06:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 23:06:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 23:06:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 23:06:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 23:06:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 23:06:51,407 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 23:06:51,408 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 23:06:51,520 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 23:06:51,524 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 23:06:51,524 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 23:06:51,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:06:51 BoogieIcfgContainer [2022-01-30 23:06:51,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 23:06:51,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 23:06:51,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 23:06:51,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 23:06:51,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 11:06:51" (1/3) ... [2022-01-30 23:06:51,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f109e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:06:51, skipping insertion in model container [2022-01-30 23:06:51,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 11:06:51" (2/3) ... [2022-01-30 23:06:51,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f109e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 11:06:51, skipping insertion in model container [2022-01-30 23:06:51,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 11:06:51" (3/3) ... [2022-01-30 23:06:51,532 INFO L111 eAbstractionObserver]: Analyzing ICFG bor2.i [2022-01-30 23:06:51,535 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 23:06:51,536 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 23:06:51,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 23:06:51,574 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=FAST_UPR [2022-01-30 23:06:51,574 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 23:06:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 23:06:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 23:06:51,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:51,590 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:51,590 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:51,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1514933818, now seen corresponding path program 1 times [2022-01-30 23:06:51,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:51,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018894343] [2022-01-30 23:06:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:51,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:51,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:06:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:51,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-30 23:06:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:51,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 23:06:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:51,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-30 23:06:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 23:06:51,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:06:51,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018894343] [2022-01-30 23:06:51,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018894343] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:06:51,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 23:06:51,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 23:06:51,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995276524] [2022-01-30 23:06:51,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:06:51,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:06:51,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:06:51,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:06:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 23:06:51,799 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:06:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:06:51,842 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-01-30 23:06:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:06:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-30 23:06:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:06:51,848 INFO L225 Difference]: With dead ends: 54 [2022-01-30 23:06:51,848 INFO L226 Difference]: Without dead ends: 26 [2022-01-30 23:06:51,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 23:06:51,853 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:06:51,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:06:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-30 23:06:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-30 23:06:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:06:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-30 23:06:51,879 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2022-01-30 23:06:51,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:06:51,880 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-30 23:06:51,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:06:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-30 23:06:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 23:06:51,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:51,881 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:51,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 23:06:51,882 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash -649748416, now seen corresponding path program 1 times [2022-01-30 23:06:51,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:51,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564842762] [2022-01-30 23:06:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:51,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:51,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:06:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:51,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-30 23:06:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:51,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 23:06:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-30 23:06:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 23:06:52,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:06:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564842762] [2022-01-30 23:06:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564842762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:06:52,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161821861] [2022-01-30 23:06:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:52,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:52,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:06:52,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:06:52,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 23:06:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 23:06:52,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:06:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 23:06:52,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:06:52,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161821861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:06:52,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 23:06:52,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 23:06:52,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683927252] [2022-01-30 23:06:52,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:06:52,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:06:52,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:06:52,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:06:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:06:52,185 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:06:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:06:52,201 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-01-30 23:06:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:06:52,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-30 23:06:52,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:06:52,203 INFO L225 Difference]: With dead ends: 46 [2022-01-30 23:06:52,203 INFO L226 Difference]: Without dead ends: 28 [2022-01-30 23:06:52,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:06:52,205 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:06:52,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:06:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-30 23:06:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-30 23:06:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:06:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-30 23:06:52,215 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-30 23:06:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:06:52,215 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-30 23:06:52,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:06:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-30 23:06:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-30 23:06:52,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:52,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:52,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 23:06:52,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:52,426 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:52,427 INFO L85 PathProgramCache]: Analyzing trace with hash 506973090, now seen corresponding path program 1 times [2022-01-30 23:06:52,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:52,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779709993] [2022-01-30 23:06:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:52,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:06:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 23:06:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-30 23:06:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-30 23:06:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 23:06:52,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:06:52,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779709993] [2022-01-30 23:06:52,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779709993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:06:52,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992199567] [2022-01-30 23:06:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:52,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:52,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:06:52,527 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:06:52,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 23:06:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 23:06:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:06:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-30 23:06:52,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:06:52,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992199567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:06:52,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 23:06:52,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-30 23:06:52,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318359133] [2022-01-30 23:06:52,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:06:52,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:06:52,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:06:52,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:06:52,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:06:52,661 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:06:52,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:06:52,669 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-01-30 23:06:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:06:52,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-30 23:06:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:06:52,670 INFO L225 Difference]: With dead ends: 46 [2022-01-30 23:06:52,670 INFO L226 Difference]: Without dead ends: 29 [2022-01-30 23:06:52,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:06:52,671 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:06:52,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:06:52,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-30 23:06:52,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-30 23:06:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:06:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-30 23:06:52,675 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2022-01-30 23:06:52,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:06:52,675 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-30 23:06:52,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:06:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-30 23:06:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-30 23:06:52,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:52,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:52,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 23:06:52,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-30 23:06:52,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:52,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:52,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1359785280, now seen corresponding path program 1 times [2022-01-30 23:06:52,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:52,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767218591] [2022-01-30 23:06:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:52,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:06:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 23:06:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-30 23:06:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:52,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-30 23:06:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-30 23:06:53,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:06:53,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767218591] [2022-01-30 23:06:53,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767218591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:06:53,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296611990] [2022-01-30 23:06:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:53,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:53,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:06:53,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:06:53,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 23:06:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:53,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 23:06:53,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:06:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-30 23:06:53,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 23:06:53,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296611990] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 23:06:53,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 23:06:53,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 23:06:53,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114563808] [2022-01-30 23:06:53,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 23:06:53,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 23:06:53,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:06:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 23:06:53,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:06:53,138 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:06:53,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:06:53,152 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-01-30 23:06:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 23:06:53,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-30 23:06:53,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:06:53,154 INFO L225 Difference]: With dead ends: 43 [2022-01-30 23:06:53,154 INFO L226 Difference]: Without dead ends: 30 [2022-01-30 23:06:53,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 23:06:53,155 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:06:53,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:06:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-30 23:06:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-30 23:06:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:06:53,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-30 23:06:53,162 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2022-01-30 23:06:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:06:53,163 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-30 23:06:53,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 23:06:53,164 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-30 23:06:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-30 23:06:53,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:53,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:53,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 23:06:53,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:53,372 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:53,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:53,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1659776706, now seen corresponding path program 1 times [2022-01-30 23:06:53,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:53,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679957271] [2022-01-30 23:06:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:53,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:06:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:53,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 23:06:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:53,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-30 23:06:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:53,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-30 23:06:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:06:53,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:06:53,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679957271] [2022-01-30 23:06:53,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679957271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:06:53,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60327401] [2022-01-30 23:06:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:53,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:53,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:06:53,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:06:53,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 23:06:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:53,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:06:53,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:06:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:06:53,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:06:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:06:53,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60327401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:06:53,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:06:53,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 23:06:53,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828554722] [2022-01-30 23:06:53,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:06:53,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 23:06:53,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:06:53,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 23:06:53,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 23:06:53,677 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:06:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:06:53,763 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-01-30 23:06:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 23:06:53,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-01-30 23:06:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:06:53,767 INFO L225 Difference]: With dead ends: 55 [2022-01-30 23:06:53,767 INFO L226 Difference]: Without dead ends: 35 [2022-01-30 23:06:53,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 23:06:53,768 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:06:53,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:06:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-30 23:06:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-30 23:06:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:06:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-30 23:06:53,776 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2022-01-30 23:06:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:06:53,776 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-30 23:06:53,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:06:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-30 23:06:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-30 23:06:53,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:53,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:53,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 23:06:53,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:53,984 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:53,984 INFO L85 PathProgramCache]: Analyzing trace with hash -174953884, now seen corresponding path program 2 times [2022-01-30 23:06:53,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:53,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077845056] [2022-01-30 23:06:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:53,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:54,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:06:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:54,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 23:06:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:54,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-30 23:06:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:54,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-30 23:06:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-30 23:06:54,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:06:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077845056] [2022-01-30 23:06:54,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077845056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:06:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340076735] [2022-01-30 23:06:54,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 23:06:54,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:54,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:06:54,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:06:54,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 23:06:54,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 23:06:54,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:06:54,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 23:06:54,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:06:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:06:54,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:06:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 23:06:54,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340076735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:06:54,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:06:54,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-30 23:06:54,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192022062] [2022-01-30 23:06:54,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:06:54,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-30 23:06:54,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:06:54,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-30 23:06:54,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-30 23:06:54,353 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 23:06:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:06:54,527 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-01-30 23:06:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-30 23:06:54,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-01-30 23:06:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:06:54,528 INFO L225 Difference]: With dead ends: 70 [2022-01-30 23:06:54,528 INFO L226 Difference]: Without dead ends: 50 [2022-01-30 23:06:54,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-30 23:06:54,529 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:06:54,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:06:54,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-30 23:06:54,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-30 23:06:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:06:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-30 23:06:54,533 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2022-01-30 23:06:54,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:06:54,534 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-30 23:06:54,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 23:06:54,534 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-30 23:06:54,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-30 23:06:54,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:54,535 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:54,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 23:06:54,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:54,740 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:54,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:54,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1165450546, now seen corresponding path program 3 times [2022-01-30 23:06:54,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:54,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129178686] [2022-01-30 23:06:54,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:54,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:54,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:06:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:54,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 23:06:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:54,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 23:06:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:54,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-30 23:06:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-30 23:06:54,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:06:54,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129178686] [2022-01-30 23:06:54,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129178686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:06:54,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566920316] [2022-01-30 23:06:54,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 23:06:54,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:54,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:06:54,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:06:54,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 23:06:54,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 23:06:54,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:06:54,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 23:06:54,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:06:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-30 23:06:54,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:06:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-30 23:06:54,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566920316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:06:54,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:06:54,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 23:06:54,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165694930] [2022-01-30 23:06:54,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:06:54,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 23:06:54,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:06:54,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 23:06:54,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 23:06:54,996 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 23:06:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:06:55,086 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-01-30 23:06:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 23:06:55,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-01-30 23:06:55,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:06:55,090 INFO L225 Difference]: With dead ends: 70 [2022-01-30 23:06:55,090 INFO L226 Difference]: Without dead ends: 55 [2022-01-30 23:06:55,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 23:06:55,091 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:06:55,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 47 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:06:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-30 23:06:55,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-30 23:06:55,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:06:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-30 23:06:55,095 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2022-01-30 23:06:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:06:55,095 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-30 23:06:55,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 23:06:55,096 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-30 23:06:55,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-30 23:06:55,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:55,096 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:55,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 23:06:55,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:55,312 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:55,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:55,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1875202744, now seen corresponding path program 4 times [2022-01-30 23:06:55,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:55,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009269959] [2022-01-30 23:06:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:55,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:55,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:06:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:55,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 23:06:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:55,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-30 23:06:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:55,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 23:06:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-30 23:06:55,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:06:55,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009269959] [2022-01-30 23:06:55,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009269959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:06:55,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272211886] [2022-01-30 23:06:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 23:06:55,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:55,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:06:55,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:06:55,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 23:06:55,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 23:06:55,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:06:55,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 23:06:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:06:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-30 23:06:55,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:06:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-30 23:06:55,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272211886] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:06:55,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:06:55,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-30 23:06:55,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670577315] [2022-01-30 23:06:55,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:06:55,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-30 23:06:55,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:06:55,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-30 23:06:55,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-30 23:06:55,635 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:06:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:06:55,710 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2022-01-30 23:06:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-30 23:06:55,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-01-30 23:06:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:06:55,713 INFO L225 Difference]: With dead ends: 90 [2022-01-30 23:06:55,713 INFO L226 Difference]: Without dead ends: 63 [2022-01-30 23:06:55,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-30 23:06:55,716 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 23:06:55,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 23:06:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-30 23:06:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-30 23:06:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:06:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-01-30 23:06:55,730 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 72 [2022-01-30 23:06:55,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:06:55,730 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-01-30 23:06:55,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:06:55,730 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-01-30 23:06:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-30 23:06:55,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:55,731 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:55,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 23:06:55,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:55,932 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:55,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1312501568, now seen corresponding path program 5 times [2022-01-30 23:06:55,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:55,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908899209] [2022-01-30 23:06:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:55,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:56,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:06:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:56,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 23:06:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:56,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-30 23:06:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:56,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-30 23:06:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-01-30 23:06:56,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:06:56,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908899209] [2022-01-30 23:06:56,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908899209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:06:56,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826236493] [2022-01-30 23:06:56,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 23:06:56,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:56,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:06:56,053 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:06:56,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 23:06:56,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-30 23:06:56,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:06:56,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 23:06:56,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:06:56,504 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-01-30 23:06:56,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:06:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-01-30 23:06:56,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826236493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:06:56,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:06:56,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2022-01-30 23:06:56,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492948301] [2022-01-30 23:06:56,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:06:56,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-30 23:06:56,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:06:56,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-30 23:06:56,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2022-01-30 23:06:56,686 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:06:57,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:06:57,076 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-01-30 23:06:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-30 23:06:57,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2022-01-30 23:06:57,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:06:57,077 INFO L225 Difference]: With dead ends: 118 [2022-01-30 23:06:57,077 INFO L226 Difference]: Without dead ends: 82 [2022-01-30 23:06:57,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=591, Invalid=2165, Unknown=0, NotChecked=0, Total=2756 [2022-01-30 23:06:57,080 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 68 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:06:57,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 50 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:06:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-30 23:06:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-01-30 23:06:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:06:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-01-30 23:06:57,085 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 96 [2022-01-30 23:06:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:06:57,086 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-01-30 23:06:57,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:06:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-01-30 23:06:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-30 23:06:57,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:57,087 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:57,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 23:06:57,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-30 23:06:57,294 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:57,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:57,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1376293102, now seen corresponding path program 6 times [2022-01-30 23:06:57,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:57,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133905736] [2022-01-30 23:06:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:57,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:57,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:06:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-30 23:06:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:57,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-30 23:06:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:57,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-01-30 23:06:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2022-01-30 23:06:57,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:06:57,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133905736] [2022-01-30 23:06:57,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133905736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:06:57,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791377559] [2022-01-30 23:06:57,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 23:06:57,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:57,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:06:57,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:06:57,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 23:06:57,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-30 23:06:57,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:06:57,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 23:06:57,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:06:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2022-01-30 23:06:57,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:06:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-01-30 23:06:57,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791377559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:06:57,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:06:57,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 25 [2022-01-30 23:06:57,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064499905] [2022-01-30 23:06:57,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:06:57,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-30 23:06:57,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:06:57,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-30 23:06:57,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-01-30 23:06:57,903 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:06:58,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:06:58,264 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2022-01-30 23:06:58,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 23:06:58,264 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2022-01-30 23:06:58,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:06:58,265 INFO L225 Difference]: With dead ends: 148 [2022-01-30 23:06:58,265 INFO L226 Difference]: Without dead ends: 96 [2022-01-30 23:06:58,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=1694, Unknown=0, NotChecked=0, Total=2162 [2022-01-30 23:06:58,266 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 67 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:06:58,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 60 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:06:58,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-30 23:06:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-01-30 23:06:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:06:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-01-30 23:06:58,272 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 146 [2022-01-30 23:06:58,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:06:58,272 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-01-30 23:06:58,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:06:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-01-30 23:06:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-30 23:06:58,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:58,273 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:58,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 23:06:58,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-30 23:06:58,487 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:58,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash -97307032, now seen corresponding path program 7 times [2022-01-30 23:06:58,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:58,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145106793] [2022-01-30 23:06:58,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:58,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:58,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:06:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:58,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-30 23:06:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:58,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-30 23:06:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:58,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-30 23:06:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:06:58,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:06:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145106793] [2022-01-30 23:06:58,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145106793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:06:58,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336910396] [2022-01-30 23:06:58,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 23:06:58,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:06:58,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:06:58,625 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:06:58,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 23:06:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:06:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-30 23:06:58,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:06:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:06:58,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:06:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:06:59,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336910396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:06:59,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:06:59,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-01-30 23:06:59,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52104946] [2022-01-30 23:06:59,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:06:59,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-30 23:06:59,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:06:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-30 23:06:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-30 23:06:59,252 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:06:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:06:59,640 INFO L93 Difference]: Finished difference Result 187 states and 208 transitions. [2022-01-30 23:06:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-30 23:06:59,640 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 160 [2022-01-30 23:06:59,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:06:59,641 INFO L225 Difference]: With dead ends: 187 [2022-01-30 23:06:59,641 INFO L226 Difference]: Without dead ends: 123 [2022-01-30 23:06:59,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1163, Invalid=1917, Unknown=0, NotChecked=0, Total=3080 [2022-01-30 23:06:59,643 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 23:06:59,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 42 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 23:06:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-30 23:06:59,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-01-30 23:06:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:06:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2022-01-30 23:06:59,648 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 160 [2022-01-30 23:06:59,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:06:59,649 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2022-01-30 23:06:59,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:06:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2022-01-30 23:06:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-30 23:06:59,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:06:59,650 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 26, 26, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:06:59,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 23:06:59,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-30 23:06:59,863 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:06:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:06:59,864 INFO L85 PathProgramCache]: Analyzing trace with hash -582371260, now seen corresponding path program 8 times [2022-01-30 23:06:59,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:06:59,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053202805] [2022-01-30 23:06:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:06:59,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:06:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:00,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:07:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:00,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-30 23:07:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:00,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-30 23:07:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:00,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-01-30 23:07:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:07:00,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:07:00,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053202805] [2022-01-30 23:07:00,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053202805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:07:00,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226416840] [2022-01-30 23:07:00,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 23:07:00,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:07:00,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:07:00,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:07:00,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 23:07:00,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 23:07:00,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:07:00,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-30 23:07:00,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:07:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:07:00,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:07:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:07:01,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226416840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:07:01,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:07:01,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-01-30 23:07:01,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304497243] [2022-01-30 23:07:01,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:07:01,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-30 23:07:01,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:07:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-30 23:07:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-30 23:07:01,420 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:07:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:07:02,691 INFO L93 Difference]: Finished difference Result 243 states and 278 transitions. [2022-01-30 23:07:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-30 23:07:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 188 [2022-01-30 23:07:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:07:02,694 INFO L225 Difference]: With dead ends: 243 [2022-01-30 23:07:02,695 INFO L226 Difference]: Without dead ends: 179 [2022-01-30 23:07:02,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4677, Invalid=7755, Unknown=0, NotChecked=0, Total=12432 [2022-01-30 23:07:02,698 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 23:07:02,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 52 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 23:07:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-30 23:07:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-01-30 23:07:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 171 states have (on average 1.0175438596491229) internal successors, (174), 171 states have internal predecessors, (174), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:07:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 183 transitions. [2022-01-30 23:07:02,705 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 183 transitions. Word has length 188 [2022-01-30 23:07:02,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:07:02,706 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 183 transitions. [2022-01-30 23:07:02,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.3275862068965516) internal successors, (135), 57 states have internal predecessors, (135), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:07:02,706 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 183 transitions. [2022-01-30 23:07:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-30 23:07:02,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:07:02,708 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 42, 42, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:07:02,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 23:07:02,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 23:07:02,926 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:07:02,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:07:02,926 INFO L85 PathProgramCache]: Analyzing trace with hash 855922172, now seen corresponding path program 9 times [2022-01-30 23:07:02,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:07:02,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791400684] [2022-01-30 23:07:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:07:02,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:07:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:07:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:03,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-01-30 23:07:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:03,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-30 23:07:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:03,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-01-30 23:07:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4879 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-30 23:07:03,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:07:03,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791400684] [2022-01-30 23:07:03,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791400684] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:07:03,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539172867] [2022-01-30 23:07:03,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 23:07:03,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:07:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:07:03,984 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:07:04,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 23:07:04,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-30 23:07:04,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:07:04,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 23:07:04,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:07:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4879 backedges. 850 proven. 100 refuted. 0 times theorem prover too weak. 3929 trivial. 0 not checked. [2022-01-30 23:07:05,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:07:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4879 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4779 trivial. 0 not checked. [2022-01-30 23:07:06,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539172867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:07:06,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:07:06,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 13, 13] total 80 [2022-01-30 23:07:06,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717510269] [2022-01-30 23:07:06,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:07:06,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-30 23:07:06,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:07:06,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-30 23:07:06,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1873, Invalid=4447, Unknown=0, NotChecked=0, Total=6320 [2022-01-30 23:07:06,014 INFO L87 Difference]: Start difference. First operand 179 states and 183 transitions. Second operand has 80 states, 80 states have (on average 2.2875) internal successors, (183), 79 states have internal predecessors, (183), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:07:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:07:08,133 INFO L93 Difference]: Finished difference Result 270 states and 290 transitions. [2022-01-30 23:07:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-30 23:07:08,134 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 79 states have internal predecessors, (183), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 244 [2022-01-30 23:07:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:07:08,135 INFO L225 Difference]: With dead ends: 270 [2022-01-30 23:07:08,135 INFO L226 Difference]: Without dead ends: 206 [2022-01-30 23:07:08,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4763 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5613, Invalid=18879, Unknown=0, NotChecked=0, Total=24492 [2022-01-30 23:07:08,141 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 183 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 23:07:08,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 60 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 23:07:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-30 23:07:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-01-30 23:07:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 197 states have (on average 1.015228426395939) internal successors, (200), 197 states have internal predecessors, (200), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:07:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 209 transitions. [2022-01-30 23:07:08,147 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 209 transitions. Word has length 244 [2022-01-30 23:07:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:07:08,147 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 209 transitions. [2022-01-30 23:07:08,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 79 states have internal predecessors, (183), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:07:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 209 transitions. [2022-01-30 23:07:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-30 23:07:08,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:07:08,149 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 42, 42, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:07:08,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-30 23:07:08,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-30 23:07:08,363 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:07:08,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:07:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash 990884166, now seen corresponding path program 10 times [2022-01-30 23:07:08,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:07:08,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323749577] [2022-01-30 23:07:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:07:08,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:07:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:09,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:07:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:09,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-01-30 23:07:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:09,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-30 23:07:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:09,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-01-30 23:07:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5372 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2022-01-30 23:07:09,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:07:09,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323749577] [2022-01-30 23:07:09,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323749577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:07:09,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187158133] [2022-01-30 23:07:09,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 23:07:09,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:07:09,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:07:09,379 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:07:09,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 23:07:09,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 23:07:09,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 23:07:09,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 23:07:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 23:07:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5372 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-01-30 23:07:10,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 23:07:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5372 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-01-30 23:07:10,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187158133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 23:07:10,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 23:07:10,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 17, 17] total 89 [2022-01-30 23:07:10,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87302581] [2022-01-30 23:07:10,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 23:07:10,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-30 23:07:10,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 23:07:10,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-30 23:07:10,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=5682, Unknown=0, NotChecked=0, Total=7832 [2022-01-30 23:07:10,823 INFO L87 Difference]: Start difference. First operand 205 states and 209 transitions. Second operand has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 88 states have internal predecessors, (202), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:07:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 23:07:13,265 INFO L93 Difference]: Finished difference Result 328 states and 355 transitions. [2022-01-30 23:07:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-30 23:07:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 88 states have internal predecessors, (202), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 270 [2022-01-30 23:07:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 23:07:13,267 INFO L225 Difference]: With dead ends: 328 [2022-01-30 23:07:13,267 INFO L226 Difference]: Without dead ends: 240 [2022-01-30 23:07:13,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6235 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6444, Invalid=24006, Unknown=0, NotChecked=0, Total=30450 [2022-01-30 23:07:13,271 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 205 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 23:07:13,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 90 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 23:07:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-30 23:07:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2022-01-30 23:07:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 231 states have (on average 1.0129870129870129) internal successors, (234), 231 states have internal predecessors, (234), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 23:07:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 243 transitions. [2022-01-30 23:07:13,277 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 243 transitions. Word has length 270 [2022-01-30 23:07:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 23:07:13,277 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 243 transitions. [2022-01-30 23:07:13,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 88 states have internal predecessors, (202), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 23:07:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 243 transitions. [2022-01-30 23:07:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-30 23:07:13,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 23:07:13,279 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 56, 56, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 23:07:13,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 23:07:13,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-30 23:07:13,492 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 23:07:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 23:07:13,492 INFO L85 PathProgramCache]: Analyzing trace with hash 203984648, now seen corresponding path program 11 times [2022-01-30 23:07:13,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 23:07:13,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875145417] [2022-01-30 23:07:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 23:07:13,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 23:07:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:14,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 23:07:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:14,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-30 23:07:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:14,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-30 23:07:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:14,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 299 [2022-01-30 23:07:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 23:07:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11915 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 8779 trivial. 0 not checked. [2022-01-30 23:07:14,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 23:07:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875145417] [2022-01-30 23:07:14,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875145417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 23:07:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806839225] [2022-01-30 23:07:14,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 23:07:14,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 23:07:14,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 23:07:14,608 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 23:07:14,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process