/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-fpi/nsqm-iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 00:05:38,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 00:05:38,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 00:05:38,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-16 00:05:38,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 00:05:38,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 00:05:38,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 00:05:38,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 00:05:38,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 00:05:38,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 00:05:38,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 00:05:38,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 00:05:38,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 00:05:38,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 00:05:38,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 00:05:38,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 00:05:38,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 00:05:38,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 00:05:38,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 00:05:38,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 00:05:38,622 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 00:05:38,676 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 00:05:38,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 00:05:38,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 00:05:38,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 00:05:38,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 00:05:38,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 00:05:38,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 00:05:38,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 00:05:38,683 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 00:05:38,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 00:05:38,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 00:05:38,685 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 00:05:38,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 00:05:38,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 00:05:38,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 00:05:38,686 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 00:05:38,686 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 00:05:38,686 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 00:05:38,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 00:05:38,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 00:05:38,687 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 00:05:38,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 00:05:38,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 00:05:38,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 00:05:38,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 00:05:38,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 00:05:38,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 00:05:38,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 00:05:38,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 00:05:38,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 00:05:38,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 00:05:39,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 00:05:39,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 00:05:39,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 00:05:39,152 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 00:05:39,153 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 00:05:39,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm-iff.c [2022-10-16 00:05:39,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197c6bd83/0145ba2a551d419495c18695e056243b/FLAGe1da605cb [2022-10-16 00:05:39,829 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 00:05:39,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm-iff.c [2022-10-16 00:05:39,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197c6bd83/0145ba2a551d419495c18695e056243b/FLAGe1da605cb [2022-10-16 00:05:40,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197c6bd83/0145ba2a551d419495c18695e056243b [2022-10-16 00:05:40,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 00:05:40,172 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 00:05:40,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 00:05:40,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 00:05:40,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 00:05:40,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c1db8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40, skipping insertion in model container [2022-10-16 00:05:40,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 00:05:40,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 00:05:40,376 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm-iff.c[591,604] [2022-10-16 00:05:40,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 00:05:40,413 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 00:05:40,429 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm-iff.c[591,604] [2022-10-16 00:05:40,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 00:05:40,456 INFO L208 MainTranslator]: Completed translation [2022-10-16 00:05:40,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40 WrapperNode [2022-10-16 00:05:40,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 00:05:40,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 00:05:40,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 00:05:40,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 00:05:40,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,505 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-10-16 00:05:40,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 00:05:40,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 00:05:40,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 00:05:40,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 00:05:40,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,537 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 00:05:40,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 00:05:40,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 00:05:40,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 00:05:40,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (1/1) ... [2022-10-16 00:05:40,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 00:05:40,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:05:40,590 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) [2022-10-16 00:05:40,614 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 [2022-10-16 00:05:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 00:05:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 00:05:40,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 00:05:40,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-16 00:05:40,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 00:05:40,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 00:05:40,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 00:05:40,796 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 00:05:40,799 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 00:05:41,210 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 00:05:41,220 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 00:05:41,220 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-16 00:05:41,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:05:41 BoogieIcfgContainer [2022-10-16 00:05:41,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 00:05:41,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 00:05:41,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 00:05:41,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 00:05:41,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:05:40" (1/3) ... [2022-10-16 00:05:41,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c64b213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:05:41, skipping insertion in model container [2022-10-16 00:05:41,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:05:40" (2/3) ... [2022-10-16 00:05:41,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c64b213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:05:41, skipping insertion in model container [2022-10-16 00:05:41,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:05:41" (3/3) ... [2022-10-16 00:05:41,241 INFO L112 eAbstractionObserver]: Analyzing ICFG nsqm-iff.c [2022-10-16 00:05:41,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 00:05:41,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-10-16 00:05:41,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 00:05:41,489 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2c5823f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 00:05:41,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-10-16 00:05:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 32 states have (on average 1.90625) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-16 00:05:41,517 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:41,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-16 00:05:41,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:41,528 INFO L85 PathProgramCache]: Analyzing trace with hash 925703, now seen corresponding path program 1 times [2022-10-16 00:05:41,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:41,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463739099] [2022-10-16 00:05:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:41,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:41,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:05:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463739099] [2022-10-16 00:05:41,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463739099] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:05:41,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:05:41,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 00:05:41,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250552464] [2022-10-16 00:05:41,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:05:41,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 00:05:41,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:05:41,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 00:05:41,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:05:41,820 INFO L87 Difference]: Start difference. First operand has 51 states, 32 states have (on average 1.90625) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:05:41,908 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-10-16 00:05:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 00:05:41,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-16 00:05:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:05:41,925 INFO L225 Difference]: With dead ends: 52 [2022-10-16 00:05:41,926 INFO L226 Difference]: Without dead ends: 49 [2022-10-16 00:05:41,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:05:41,937 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:05:41,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 85 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:05:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-16 00:05:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-10-16 00:05:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-10-16 00:05:41,978 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 4 [2022-10-16 00:05:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:05:41,979 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-10-16 00:05:41,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-10-16 00:05:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 00:05:41,980 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:41,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:41,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 00:05:41,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:41,982 INFO L85 PathProgramCache]: Analyzing trace with hash 179478226, now seen corresponding path program 1 times [2022-10-16 00:05:41,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:41,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940927950] [2022-10-16 00:05:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:41,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:42,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:05:42,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940927950] [2022-10-16 00:05:42,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940927950] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:05:42,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:05:42,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 00:05:42,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447176637] [2022-10-16 00:05:42,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:05:42,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 00:05:42,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:05:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 00:05:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:05:42,147 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:42,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:05:42,187 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-10-16 00:05:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 00:05:42,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-16 00:05:42,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:05:42,189 INFO L225 Difference]: With dead ends: 45 [2022-10-16 00:05:42,189 INFO L226 Difference]: Without dead ends: 45 [2022-10-16 00:05:42,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:05:42,192 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:05:42,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:05:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-16 00:05:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-10-16 00:05:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-10-16 00:05:42,200 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 8 [2022-10-16 00:05:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:05:42,201 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-10-16 00:05:42,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-10-16 00:05:42,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 00:05:42,202 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:42,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:42,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 00:05:42,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:42,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:42,204 INFO L85 PathProgramCache]: Analyzing trace with hash 179478227, now seen corresponding path program 1 times [2022-10-16 00:05:42,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:42,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122741826] [2022-10-16 00:05:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:42,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:42,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:05:42,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122741826] [2022-10-16 00:05:42,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122741826] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:05:42,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:05:42,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 00:05:42,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89674999] [2022-10-16 00:05:42,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:05:42,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 00:05:42,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:05:42,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 00:05:42,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:05:42,495 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:05:42,577 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-10-16 00:05:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 00:05:42,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-16 00:05:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:05:42,579 INFO L225 Difference]: With dead ends: 44 [2022-10-16 00:05:42,579 INFO L226 Difference]: Without dead ends: 44 [2022-10-16 00:05:42,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:05:42,582 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:05:42,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:05:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-16 00:05:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-10-16 00:05:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-10-16 00:05:42,590 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 8 [2022-10-16 00:05:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:05:42,590 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-10-16 00:05:42,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-10-16 00:05:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 00:05:42,591 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:42,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:42,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 00:05:42,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash 179478387, now seen corresponding path program 1 times [2022-10-16 00:05:42,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:42,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952508279] [2022-10-16 00:05:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:42,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:42,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:05:42,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952508279] [2022-10-16 00:05:42,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952508279] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:05:42,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:05:42,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 00:05:42,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404122133] [2022-10-16 00:05:42,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:05:42,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 00:05:42,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:05:42,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 00:05:42,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:05:42,660 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:05:42,766 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-10-16 00:05:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 00:05:42,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-16 00:05:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:05:42,768 INFO L225 Difference]: With dead ends: 65 [2022-10-16 00:05:42,768 INFO L226 Difference]: Without dead ends: 65 [2022-10-16 00:05:42,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 00:05:42,771 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:05:42,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:05:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-10-16 00:05:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2022-10-16 00:05:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.542857142857143) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-10-16 00:05:42,793 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 8 [2022-10-16 00:05:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:05:42,794 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-10-16 00:05:42,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-10-16 00:05:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-16 00:05:42,798 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:42,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:42,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 00:05:42,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash 678597336, now seen corresponding path program 1 times [2022-10-16 00:05:42,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:42,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739514451] [2022-10-16 00:05:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:42,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:42,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:05:42,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739514451] [2022-10-16 00:05:42,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739514451] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:05:42,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:05:42,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 00:05:42,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649819808] [2022-10-16 00:05:42,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:05:42,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 00:05:42,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:05:42,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 00:05:42,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:05:42,925 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:05:43,027 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-10-16 00:05:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 00:05:43,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-16 00:05:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:05:43,030 INFO L225 Difference]: With dead ends: 60 [2022-10-16 00:05:43,031 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 00:05:43,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:05:43,033 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 74 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:05:43,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 44 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:05:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 00:05:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2022-10-16 00:05:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-10-16 00:05:43,051 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 10 [2022-10-16 00:05:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:05:43,051 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-10-16 00:05:43,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:43,052 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-10-16 00:05:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-16 00:05:43,053 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:43,053 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:43,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 00:05:43,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash 533126947, now seen corresponding path program 1 times [2022-10-16 00:05:43,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:43,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991264925] [2022-10-16 00:05:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:43,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:43,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:05:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991264925] [2022-10-16 00:05:43,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991264925] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:05:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774471020] [2022-10-16 00:05:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:43,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:05:43,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:05:43,209 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) [2022-10-16 00:05:43,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 00:05:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:43,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-16 00:05:43,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:05:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:43,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:05:43,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-10-16 00:05:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:43,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774471020] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:05:43,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:05:43,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-10-16 00:05:43,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263919752] [2022-10-16 00:05:43,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:05:43,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 00:05:43,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:05:43,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 00:05:43,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-10-16 00:05:43,657 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:05:43,929 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2022-10-16 00:05:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 00:05:43,930 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-16 00:05:43,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:05:43,932 INFO L225 Difference]: With dead ends: 97 [2022-10-16 00:05:43,932 INFO L226 Difference]: Without dead ends: 97 [2022-10-16 00:05:43,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-10-16 00:05:43,934 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 157 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 00:05:43,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 106 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 00:05:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-10-16 00:05:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2022-10-16 00:05:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:43,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-10-16 00:05:43,943 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 12 [2022-10-16 00:05:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:05:43,944 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-10-16 00:05:43,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-10-16 00:05:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-16 00:05:43,945 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:43,945 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:43,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 00:05:44,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-16 00:05:44,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:44,160 INFO L85 PathProgramCache]: Analyzing trace with hash -652933853, now seen corresponding path program 1 times [2022-10-16 00:05:44,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:44,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754283687] [2022-10-16 00:05:44,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:44,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 00:05:44,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:05:44,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754283687] [2022-10-16 00:05:44,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754283687] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:05:44,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735262406] [2022-10-16 00:05:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:44,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:05:44,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:05:44,325 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) [2022-10-16 00:05:44,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 00:05:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 00:05:44,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:05:44,445 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 00:05:44,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 00:05:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 00:05:44,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:05:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 00:05:44,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735262406] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:05:44,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:05:44,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-10-16 00:05:44,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117959413] [2022-10-16 00:05:44,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:05:44,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 00:05:44,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:05:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 00:05:44,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-10-16 00:05:44,681 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:05:44,890 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-10-16 00:05:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 00:05:44,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-16 00:05:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:05:44,894 INFO L225 Difference]: With dead ends: 55 [2022-10-16 00:05:44,894 INFO L226 Difference]: Without dead ends: 55 [2022-10-16 00:05:44,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-10-16 00:05:44,903 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 87 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:05:44,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 62 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:05:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-16 00:05:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-10-16 00:05:44,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-10-16 00:05:44,926 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 13 [2022-10-16 00:05:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:05:44,926 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-10-16 00:05:44,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-10-16 00:05:44,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-16 00:05:44,929 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:44,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:44,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 00:05:45,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-16 00:05:45,145 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:45,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1232447112, now seen corresponding path program 1 times [2022-10-16 00:05:45,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:45,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052455202] [2022-10-16 00:05:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:45,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:45,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:05:45,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052455202] [2022-10-16 00:05:45,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052455202] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:05:45,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:05:45,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 00:05:45,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625667118] [2022-10-16 00:05:45,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:05:45,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 00:05:45,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:05:45,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 00:05:45,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:05:45,335 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:05:45,366 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-10-16 00:05:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 00:05:45,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-16 00:05:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:05:45,368 INFO L225 Difference]: With dead ends: 49 [2022-10-16 00:05:45,368 INFO L226 Difference]: Without dead ends: 49 [2022-10-16 00:05:45,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 00:05:45,374 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:05:45,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 33 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:05:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-16 00:05:45,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-10-16 00:05:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-10-16 00:05:45,395 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 14 [2022-10-16 00:05:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:05:45,395 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-10-16 00:05:45,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-10-16 00:05:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-16 00:05:45,397 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:45,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:45,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-16 00:05:45,398 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:45,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:45,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1232447113, now seen corresponding path program 1 times [2022-10-16 00:05:45,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:45,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938516330] [2022-10-16 00:05:45,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:45,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 00:05:45,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:05:45,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938516330] [2022-10-16 00:05:45,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938516330] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:05:45,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:05:45,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 00:05:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025172377] [2022-10-16 00:05:45,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:05:45,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 00:05:45,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:05:45,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 00:05:45,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:05:45,581 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:05:45,624 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-10-16 00:05:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 00:05:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-16 00:05:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:05:45,625 INFO L225 Difference]: With dead ends: 48 [2022-10-16 00:05:45,626 INFO L226 Difference]: Without dead ends: 48 [2022-10-16 00:05:45,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:05:45,632 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 101 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:05:45,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:05:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-16 00:05:45,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-10-16 00:05:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-10-16 00:05:45,646 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 14 [2022-10-16 00:05:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:05:45,646 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-10-16 00:05:45,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-10-16 00:05:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 00:05:45,648 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:45,648 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:45,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-16 00:05:45,648 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:45,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1312679882, now seen corresponding path program 1 times [2022-10-16 00:05:45,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:45,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254072916] [2022-10-16 00:05:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:45,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:45,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:05:45,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254072916] [2022-10-16 00:05:45,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254072916] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 00:05:45,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663668416] [2022-10-16 00:05:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:45,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:05:45,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:05:45,774 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) [2022-10-16 00:05:45,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 00:05:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:45,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 00:05:45,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 00:05:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:45,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 00:05:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 00:05:45,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663668416] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 00:05:45,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 00:05:45,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-10-16 00:05:45,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492266515] [2022-10-16 00:05:45,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 00:05:45,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 00:05:45,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:05:45,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 00:05:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-10-16 00:05:45,953 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:46,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:05:46,119 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2022-10-16 00:05:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-16 00:05:46,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-16 00:05:46,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:05:46,121 INFO L225 Difference]: With dead ends: 107 [2022-10-16 00:05:46,121 INFO L226 Difference]: Without dead ends: 107 [2022-10-16 00:05:46,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-10-16 00:05:46,123 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 94 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 00:05:46,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 76 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 00:05:46,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-10-16 00:05:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2022-10-16 00:05:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.25) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-10-16 00:05:46,128 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 18 [2022-10-16 00:05:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:05:46,128 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-10-16 00:05:46,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:46,129 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-10-16 00:05:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-16 00:05:46,129 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:46,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:46,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 00:05:46,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:05:46,345 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:46,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:46,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2038414147, now seen corresponding path program 1 times [2022-10-16 00:05:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:46,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073344563] [2022-10-16 00:05:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:46,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 00:05:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-16 00:05:46,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 00:05:46,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073344563] [2022-10-16 00:05:46,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073344563] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 00:05:46,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 00:05:46,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 00:05:46,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562205802] [2022-10-16 00:05:46,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 00:05:46,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 00:05:46,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 00:05:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 00:05:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:05:46,434 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 00:05:46,480 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2022-10-16 00:05:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 00:05:46,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-16 00:05:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 00:05:46,481 INFO L225 Difference]: With dead ends: 73 [2022-10-16 00:05:46,481 INFO L226 Difference]: Without dead ends: 73 [2022-10-16 00:05:46,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-16 00:05:46,482 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 44 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 00:05:46,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 52 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 00:05:46,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-16 00:05:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-10-16 00:05:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-10-16 00:05:46,487 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 19 [2022-10-16 00:05:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 00:05:46,487 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-10-16 00:05:46,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 00:05:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-10-16 00:05:46,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-16 00:05:46,488 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 00:05:46,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:46,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 00:05:46,489 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2022-10-16 00:05:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 00:05:46,489 INFO L85 PathProgramCache]: Analyzing trace with hash 146771774, now seen corresponding path program 1 times [2022-10-16 00:05:46,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 00:05:46,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364315847] [2022-10-16 00:05:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:46,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 00:05:46,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-16 00:05:46,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475764528] [2022-10-16 00:05:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 00:05:46,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:05:46,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 00:05:46,506 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) [2022-10-16 00:05:46,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 00:05:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-16 00:05:46,568 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-16 00:05:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-16 00:05:46,637 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-16 00:05:46,638 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-16 00:05:46,642 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2022-10-16 00:05:46,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2022-10-16 00:05:46,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2022-10-16 00:05:46,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2022-10-16 00:05:46,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2022-10-16 00:05:46,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2022-10-16 00:05:46,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2022-10-16 00:05:46,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2022-10-16 00:05:46,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2022-10-16 00:05:46,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 18 remaining) [2022-10-16 00:05:46,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 18 remaining) [2022-10-16 00:05:46,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 18 remaining) [2022-10-16 00:05:46,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2022-10-16 00:05:46,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2022-10-16 00:05:46,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2022-10-16 00:05:46,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2022-10-16 00:05:46,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2022-10-16 00:05:46,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK (0 of 18 remaining) [2022-10-16 00:05:46,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 00:05:46,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 00:05:46,871 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 00:05:46,875 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-16 00:05:46,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 12:05:46 BoogieIcfgContainer [2022-10-16 00:05:46,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-16 00:05:46,928 INFO L158 Benchmark]: Toolchain (without parser) took 6760.88ms. Allocated memory was 152.0MB in the beginning and 204.5MB in the end (delta: 52.4MB). Free memory was 126.7MB in the beginning and 110.4MB in the end (delta: 16.2MB). Peak memory consumption was 69.5MB. Max. memory is 8.0GB. [2022-10-16 00:05:46,928 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 152.0MB. Free memory is still 121.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-10-16 00:05:46,929 INFO L158 Benchmark]: CACSL2BoogieTranslator took 284.18ms. Allocated memory is still 152.0MB. Free memory was 126.5MB in the beginning and 116.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-10-16 00:05:46,929 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.42ms. Allocated memory is still 152.0MB. Free memory was 116.0MB in the beginning and 114.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-10-16 00:05:46,930 INFO L158 Benchmark]: Boogie Preprocessor took 37.75ms. Allocated memory is still 152.0MB. Free memory was 114.3MB in the beginning and 113.1MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-10-16 00:05:46,931 INFO L158 Benchmark]: RCFGBuilder took 679.60ms. Allocated memory is still 152.0MB. Free memory was 112.8MB in the beginning and 98.5MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-10-16 00:05:46,932 INFO L158 Benchmark]: TraceAbstraction took 5698.14ms. Allocated memory was 152.0MB in the beginning and 204.5MB in the end (delta: 52.4MB). Free memory was 98.0MB in the beginning and 110.4MB in the end (delta: -12.5MB). Peak memory consumption was 40.2MB. Max. memory is 8.0GB. [2022-10-16 00:05:46,934 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 152.0MB. Free memory is still 121.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 284.18ms. Allocated memory is still 152.0MB. Free memory was 126.5MB in the beginning and 116.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 46.42ms. Allocated memory is still 152.0MB. Free memory was 116.0MB in the beginning and 114.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.75ms. Allocated memory is still 152.0MB. Free memory was 114.3MB in the beginning and 113.1MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 679.60ms. Allocated memory is still 152.0MB. Free memory was 112.8MB in the beginning and 98.5MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 5698.14ms. Allocated memory was 152.0MB in the beginning and 204.5MB in the end (delta: 52.4MB). Free memory was 98.0MB in the beginning and 110.4MB in the end (delta: -12.5MB). Peak memory consumption was 40.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 15. Possible FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [a={-2:0}, b={-1:0}, i=0, N=1] [L31] COND TRUE i