/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-examples/standard_sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 18:13:44,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 18:13:44,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 18:13:44,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-15 18:13:44,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 18:13:44,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 18:13:44,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 18:13:44,686 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 [2022-10-15 18:13:44,714 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 18:13:44,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 18:13:44,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 18:13:44,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 18:13:44,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 18:13:44,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 18:13:44,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 18:13:44,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 18:13:44,718 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 18:13:44,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 18:13:44,718 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 18:13:44,719 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 18:13:44,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 18:13:44,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 18:13:44,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 18:13:44,720 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 18:13:44,720 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 18:13:44,720 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 18:13:44,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 18:13:44,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 18:13:44,721 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 18:13:44,721 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 18:13:44,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 18:13:44,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 18:13:44,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 18:13:44,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:13:44,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 18:13:44,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 18:13:44,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 18:13:44,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 18:13:44,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 18:13:45,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 18:13:45,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 18:13:45,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 18:13:45,145 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 18:13:45,146 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 18:13:45,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel-2.i [2022-10-15 18:13:45,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c31c36aa/6155c8c65af24768811213f84c4edabe/FLAG7d7069abb [2022-10-15 18:13:45,848 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 18:13:45,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2022-10-15 18:13:45,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c31c36aa/6155c8c65af24768811213f84c4edabe/FLAG7d7069abb [2022-10-15 18:13:46,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c31c36aa/6155c8c65af24768811213f84c4edabe [2022-10-15 18:13:46,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 18:13:46,242 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 18:13:46,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 18:13:46,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 18:13:46,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 18:13:46,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e9ab50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46, skipping insertion in model container [2022-10-15 18:13:46,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 18:13:46,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 18:13:46,505 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-examples/standard_sentinel-2.i[852,865] [2022-10-15 18:13:46,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:13:46,531 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 18:13:46,546 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-examples/standard_sentinel-2.i[852,865] [2022-10-15 18:13:46,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 18:13:46,568 INFO L208 MainTranslator]: Completed translation [2022-10-15 18:13:46,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46 WrapperNode [2022-10-15 18:13:46,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 18:13:46,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 18:13:46,571 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 18:13:46,571 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 18:13:46,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,609 INFO L138 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2022-10-15 18:13:46,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 18:13:46,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 18:13:46,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 18:13:46,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 18:13:46,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,636 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 18:13:46,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 18:13:46,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 18:13:46,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 18:13:46,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (1/1) ... [2022-10-15 18:13:46,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 18:13:46,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:46,682 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) [2022-10-15 18:13:46,686 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 [2022-10-15 18:13:46,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 18:13:46,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 18:13:46,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 18:13:46,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 18:13:46,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 18:13:46,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 18:13:46,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 18:13:46,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 18:13:46,843 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 18:13:46,846 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 18:13:47,036 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 18:13:47,050 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 18:13:47,050 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-15 18:13:47,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:13:47 BoogieIcfgContainer [2022-10-15 18:13:47,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 18:13:47,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 18:13:47,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 18:13:47,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 18:13:47,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 06:13:46" (1/3) ... [2022-10-15 18:13:47,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4a0e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:13:47, skipping insertion in model container [2022-10-15 18:13:47,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 06:13:46" (2/3) ... [2022-10-15 18:13:47,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4a0e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 06:13:47, skipping insertion in model container [2022-10-15 18:13:47,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 06:13:47" (3/3) ... [2022-10-15 18:13:47,083 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2022-10-15 18:13:47,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 18:13:47,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-10-15 18:13:47,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 18:13:47,202 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;@3f0327e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 18:13:47,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-10-15 18:13:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 26 states have internal predecessors, (32), 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) [2022-10-15 18:13:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:13:47,216 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:47,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:13:47,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-10-15 18:13:47,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:47,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918269569] [2022-10-15 18:13:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:47,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:47,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:47,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918269569] [2022-10-15 18:13:47,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918269569] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:47,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:13:47,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:13:47,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506869474] [2022-10-15 18:13:47,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:47,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:13:47,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:47,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:13:47,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:47,599 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 26 states have internal predecessors, (32), 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) [2022-10-15 18:13:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:47,648 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-10-15 18:13:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:13:47,651 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 [2022-10-15 18:13:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:47,661 INFO L225 Difference]: With dead ends: 24 [2022-10-15 18:13:47,661 INFO L226 Difference]: Without dead ends: 22 [2022-10-15 18:13:47,663 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 [2022-10-15 18:13:47,674 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:47,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:13:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-10-15 18:13:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-10-15 18:13:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 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) [2022-10-15 18:13:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-10-15 18:13:47,710 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2022-10-15 18:13:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:47,711 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-10-15 18:13:47,711 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) [2022-10-15 18:13:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-10-15 18:13:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 18:13:47,712 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:47,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 18:13:47,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 18:13:47,715 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:47,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:47,716 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-10-15 18:13:47,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:47,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093814811] [2022-10-15 18:13:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:47,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:47,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093814811] [2022-10-15 18:13:47,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093814811] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:47,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:13:47,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 18:13:47,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541384590] [2022-10-15 18:13:47,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:47,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 18:13:47,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 18:13:47,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 18:13:47,976 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. 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) [2022-10-15 18:13:48,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:48,014 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-10-15 18:13:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 18:13:48,015 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 [2022-10-15 18:13:48,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:48,016 INFO L225 Difference]: With dead ends: 26 [2022-10-15 18:13:48,016 INFO L226 Difference]: Without dead ends: 26 [2022-10-15 18:13:48,017 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 [2022-10-15 18:13:48,019 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:48,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:13:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-10-15 18:13:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-10-15 18:13:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-10-15 18:13:48,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-10-15 18:13:48,028 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 4 [2022-10-15 18:13:48,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:48,029 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-10-15 18:13:48,034 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) [2022-10-15 18:13:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-10-15 18:13:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-15 18:13:48,035 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:48,035 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:48,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 18:13:48,036 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:48,037 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-10-15 18:13:48,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:48,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667633774] [2022-10-15 18:13:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:48,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:48,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:48,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667633774] [2022-10-15 18:13:48,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667633774] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832530331] [2022-10-15 18:13:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:48,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:48,361 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) [2022-10-15 18:13:48,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 18:13:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:48,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:13:48,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:48,524 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:13:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:48,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:48,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832530331] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:48,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:48,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-15 18:13:48,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785910574] [2022-10-15 18:13:48,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:48,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 18:13:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 18:13:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-15 18:13:48,745 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-10-15 18:13:48,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:48,933 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-10-15 18:13:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:13:48,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 [2022-10-15 18:13:48,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:48,936 INFO L225 Difference]: With dead ends: 62 [2022-10-15 18:13:48,936 INFO L226 Difference]: Without dead ends: 62 [2022-10-15 18:13:48,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:13:48,943 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:48,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 73 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:13:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-15 18:13:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2022-10-15 18:13:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 35 states have internal predecessors, (40), 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) [2022-10-15 18:13:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-10-15 18:13:48,960 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 8 [2022-10-15 18:13:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:48,961 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-10-15 18:13:48,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-10-15 18:13:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-10-15 18:13:48,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-15 18:13:48,964 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:48,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-10-15 18:13:48,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:49,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:49,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:49,168 INFO L85 PathProgramCache]: Analyzing trace with hash -4646046, now seen corresponding path program 1 times [2022-10-15 18:13:49,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:49,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597035516] [2022-10-15 18:13:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:49,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-15 18:13:49,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:49,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597035516] [2022-10-15 18:13:49,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597035516] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:49,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:13:49,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:13:49,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426241283] [2022-10-15 18:13:49,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:49,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:13:49,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:13:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:13:49,342 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-10-15 18:13:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:49,377 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-10-15 18:13:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:13:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 [2022-10-15 18:13:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:49,381 INFO L225 Difference]: With dead ends: 36 [2022-10-15 18:13:49,381 INFO L226 Difference]: Without dead ends: 36 [2022-10-15 18:13:49,382 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 [2022-10-15 18:13:49,383 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:49,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:13:49,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-10-15 18:13:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-10-15 18:13:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 34 states have internal predecessors, (39), 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) [2022-10-15 18:13:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-10-15 18:13:49,401 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 13 [2022-10-15 18:13:49,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:49,402 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-10-15 18:13:49,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-10-15 18:13:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-10-15 18:13:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-15 18:13:49,404 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:49,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:49,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 18:13:49,405 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash -143995655, now seen corresponding path program 1 times [2022-10-15 18:13:49,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:49,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049825893] [2022-10-15 18:13:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:49,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:49,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:49,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049825893] [2022-10-15 18:13:49,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049825893] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:49,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020463204] [2022-10-15 18:13:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:49,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:49,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:49,525 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) [2022-10-15 18:13:49,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 18:13:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:49,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 18:13:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:49,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:49,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020463204] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:49,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:49,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-15 18:13:49,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537530519] [2022-10-15 18:13:49,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:49,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 18:13:49,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 18:13:49,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:13:49,655 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 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) [2022-10-15 18:13:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:49,699 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2022-10-15 18:13:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:13:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 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 [2022-10-15 18:13:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:49,701 INFO L225 Difference]: With dead ends: 43 [2022-10-15 18:13:49,701 INFO L226 Difference]: Without dead ends: 43 [2022-10-15 18:13:49,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-15 18:13:49,703 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:49,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 56 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:13:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-10-15 18:13:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-10-15 18:13:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 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) [2022-10-15 18:13:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-10-15 18:13:49,709 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 14 [2022-10-15 18:13:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:49,710 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-10-15 18:13:49,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 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) [2022-10-15 18:13:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-10-15 18:13:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-15 18:13:49,711 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:49,711 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-10-15 18:13:49,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:49,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:49,926 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:49,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:49,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-10-15 18:13:49,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:49,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70454110] [2022-10-15 18:13:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:49,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:50,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:50,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70454110] [2022-10-15 18:13:50,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70454110] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:50,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019963521] [2022-10-15 18:13:50,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:13:50,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:50,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:50,174 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) [2022-10-15 18:13:50,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 18:13:50,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:13:50,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:13:50,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 18:13:50,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:50,263 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:13:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:50,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:13:50,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019963521] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:50,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:13:50,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-10-15 18:13:50,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215707363] [2022-10-15 18:13:50,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 18:13:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 18:13:50,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:13:50,493 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-10-15 18:13:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:50,549 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-10-15 18:13:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 18:13:50,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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 20 [2022-10-15 18:13:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:50,551 INFO L225 Difference]: With dead ends: 41 [2022-10-15 18:13:50,551 INFO L226 Difference]: Without dead ends: 41 [2022-10-15 18:13:50,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-15 18:13:50,552 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:50,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 39 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:13:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-10-15 18:13:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-10-15 18:13:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 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) [2022-10-15 18:13:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-10-15 18:13:50,558 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 20 [2022-10-15 18:13:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:50,558 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-10-15 18:13:50,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-10-15 18:13:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-10-15 18:13:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-15 18:13:50,560 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:50,560 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:50,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:50,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:50,772 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:50,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:50,773 INFO L85 PathProgramCache]: Analyzing trace with hash 744388357, now seen corresponding path program 2 times [2022-10-15 18:13:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:50,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065827400] [2022-10-15 18:13:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:50,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:50,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:50,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065827400] [2022-10-15 18:13:50,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065827400] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:50,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995295069] [2022-10-15 18:13:50,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:13:50,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:50,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:50,921 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) [2022-10-15 18:13:50,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 18:13:50,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:13:50,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:13:50,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:13:50,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-15 18:13:51,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:13:51,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995295069] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:51,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:13:51,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2022-10-15 18:13:51,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975006626] [2022-10-15 18:13:51,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:51,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:13:51,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:51,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:13:51,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:13:51,166 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-10-15 18:13:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:51,169 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-10-15 18:13:51,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:13:51,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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 30 [2022-10-15 18:13:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:51,171 INFO L225 Difference]: With dead ends: 43 [2022-10-15 18:13:51,171 INFO L226 Difference]: Without dead ends: 41 [2022-10-15 18:13:51,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-15 18:13:51,172 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:51,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-10-15 18:13:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-10-15 18:13:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-10-15 18:13:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 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) [2022-10-15 18:13:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-10-15 18:13:51,178 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2022-10-15 18:13:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:51,178 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-10-15 18:13:51,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) 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) [2022-10-15 18:13:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-10-15 18:13:51,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 18:13:51,180 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:51,180 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:51,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:51,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:51,394 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:51,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:51,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1600216603, now seen corresponding path program 1 times [2022-10-15 18:13:51,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:51,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441950438] [2022-10-15 18:13:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:51,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-10-15 18:13:51,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:51,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441950438] [2022-10-15 18:13:51,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441950438] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:51,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:13:51,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 18:13:51,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51212647] [2022-10-15 18:13:51,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:51,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:13:51,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:13:51,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 18:13:51,588 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-10-15 18:13:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:51,613 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2022-10-15 18:13:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:13:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 31 [2022-10-15 18:13:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:51,614 INFO L225 Difference]: With dead ends: 49 [2022-10-15 18:13:51,615 INFO L226 Difference]: Without dead ends: 49 [2022-10-15 18:13:51,615 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 [2022-10-15 18:13:51,616 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:51,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:13:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-15 18:13:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-10-15 18:13:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 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) [2022-10-15 18:13:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-10-15 18:13:51,622 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 31 [2022-10-15 18:13:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:51,622 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-10-15 18:13:51,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-10-15 18:13:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-10-15 18:13:51,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-15 18:13:51,624 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:51,624 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:51,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-15 18:13:51,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:51,625 INFO L85 PathProgramCache]: Analyzing trace with hash 209862804, now seen corresponding path program 1 times [2022-10-15 18:13:51,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:51,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863133273] [2022-10-15 18:13:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:51,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:13:51,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:51,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863133273] [2022-10-15 18:13:51,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863133273] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:51,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101145168] [2022-10-15 18:13:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:51,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:51,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:51,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:51,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 18:13:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:13:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:13:51,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:13:52,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101145168] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:52,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:52,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-15 18:13:52,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998941683] [2022-10-15 18:13:52,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:52,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-15 18:13:52,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:52,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-15 18:13:52,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:13:52,037 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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) [2022-10-15 18:13:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:52,117 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2022-10-15 18:13:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-15 18:13:52,118 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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 33 [2022-10-15 18:13:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:52,119 INFO L225 Difference]: With dead ends: 74 [2022-10-15 18:13:52,119 INFO L226 Difference]: Without dead ends: 74 [2022-10-15 18:13:52,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-10-15 18:13:52,120 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:52,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 91 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:13:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-10-15 18:13:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-10-15 18:13:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 71 states have (on average 1.056338028169014) internal successors, (75), 73 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) [2022-10-15 18:13:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-10-15 18:13:52,127 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 33 [2022-10-15 18:13:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:52,128 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-10-15 18:13:52,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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) [2022-10-15 18:13:52,128 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-10-15 18:13:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-15 18:13:52,130 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:52,130 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:52,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:52,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:52,343 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:52,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1697848700, now seen corresponding path program 2 times [2022-10-15 18:13:52,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:52,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128286169] [2022-10-15 18:13:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:52,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:13:52,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:52,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128286169] [2022-10-15 18:13:52,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128286169] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:52,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483203762] [2022-10-15 18:13:52,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:13:52,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:52,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:52,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:52,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 18:13:52,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:13:52,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:13:52,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 18:13:52,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:13:52,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:13:53,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483203762] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:53,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:53,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-10-15 18:13:53,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005197174] [2022-10-15 18:13:53,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:53,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-15 18:13:53,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:53,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-15 18:13:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:13:53,406 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 33 states have internal predecessors, (128), 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) [2022-10-15 18:13:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:53,569 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2022-10-15 18:13:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-15 18:13:53,570 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 33 states have internal predecessors, (128), 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 65 [2022-10-15 18:13:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:53,571 INFO L225 Difference]: With dead ends: 138 [2022-10-15 18:13:53,571 INFO L226 Difference]: Without dead ends: 138 [2022-10-15 18:13:53,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-10-15 18:13:53,574 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:53,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 77 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 18:13:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-10-15 18:13:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-10-15 18:13:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 137 states have internal predecessors, (139), 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) [2022-10-15 18:13:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-10-15 18:13:53,602 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 65 [2022-10-15 18:13:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:53,606 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-10-15 18:13:53,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 33 states have internal predecessors, (128), 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) [2022-10-15 18:13:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-10-15 18:13:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-10-15 18:13:53,610 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:53,613 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:53,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:53,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:53,828 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:53,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1212938060, now seen corresponding path program 3 times [2022-10-15 18:13:53,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:53,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259969573] [2022-10-15 18:13:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:53,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-15 18:13:55,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:55,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259969573] [2022-10-15 18:13:55,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259969573] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913354258] [2022-10-15 18:13:55,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-15 18:13:55,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:55,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:55,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:55,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 18:13:55,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-15 18:13:55,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:13:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 18:13:55,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:55,401 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-15 18:13:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-10-15 18:13:55,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:13:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-10-15 18:13:56,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913354258] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:13:56,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:13:56,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 4, 4] total 39 [2022-10-15 18:13:56,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432544209] [2022-10-15 18:13:56,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:13:56,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-15 18:13:56,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:56,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-15 18:13:56,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=933, Unknown=0, NotChecked=0, Total=1482 [2022-10-15 18:13:56,519 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 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) [2022-10-15 18:13:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:57,559 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2022-10-15 18:13:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-10-15 18:13:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 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 129 [2022-10-15 18:13:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:57,563 INFO L225 Difference]: With dead ends: 169 [2022-10-15 18:13:57,563 INFO L226 Difference]: Without dead ends: 169 [2022-10-15 18:13:57,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1650, Invalid=3462, Unknown=0, NotChecked=0, Total=5112 [2022-10-15 18:13:57,566 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 183 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:57,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 129 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:13:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-10-15 18:13:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 148. [2022-10-15 18:13:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.0482758620689656) internal successors, (152), 147 states have internal predecessors, (152), 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) [2022-10-15 18:13:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2022-10-15 18:13:57,575 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 129 [2022-10-15 18:13:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:57,575 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2022-10-15 18:13:57,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 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) [2022-10-15 18:13:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2022-10-15 18:13:57,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-10-15 18:13:57,578 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:57,578 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:57,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 18:13:57,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:57,794 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:57,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1980215786, now seen corresponding path program 1 times [2022-10-15 18:13:57,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:57,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077013073] [2022-10-15 18:13:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:57,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2022-10-15 18:13:58,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:58,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077013073] [2022-10-15 18:13:58,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077013073] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:13:58,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 18:13:58,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 18:13:58,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571534943] [2022-10-15 18:13:58,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:13:58,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 18:13:58,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:13:58,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 18:13:58,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 18:13:58,140 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-10-15 18:13:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:13:58,175 INFO L93 Difference]: Finished difference Result 154 states and 157 transitions. [2022-10-15 18:13:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 18:13:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 135 [2022-10-15 18:13:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:13:58,177 INFO L225 Difference]: With dead ends: 154 [2022-10-15 18:13:58,177 INFO L226 Difference]: Without dead ends: 154 [2022-10-15 18:13:58,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-15 18:13:58,178 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:13:58,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 18:13:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-10-15 18:13:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2022-10-15 18:13:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 147 states have (on average 1.0476190476190477) internal successors, (154), 149 states have internal predecessors, (154), 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) [2022-10-15 18:13:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2022-10-15 18:13:58,185 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 135 [2022-10-15 18:13:58,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:13:58,187 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2022-10-15 18:13:58,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-10-15 18:13:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2022-10-15 18:13:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-10-15 18:13:58,191 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:13:58,191 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:13:58,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-15 18:13:58,192 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:13:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:13:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash -316702664, now seen corresponding path program 1 times [2022-10-15 18:13:58,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:13:58,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373429168] [2022-10-15 18:13:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:58,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:13:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:59,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:13:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373429168] [2022-10-15 18:13:59,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373429168] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:13:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208541564] [2022-10-15 18:13:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:13:59,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:13:59,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:13:59,611 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:13:59,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 18:13:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:13:59,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 33 conjunts are in the unsatisfiable core [2022-10-15 18:13:59,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:13:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:13:59,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:01,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208541564] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:01,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:01,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2022-10-15 18:14:01,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575625200] [2022-10-15 18:14:01,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:01,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-10-15 18:14:01,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:01,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-10-15 18:14:01,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2022-10-15 18:14:01,418 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 67 states, 67 states have (on average 4.0) internal successors, (268), 67 states have internal predecessors, (268), 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) [2022-10-15 18:14:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:01,782 INFO L93 Difference]: Finished difference Result 282 states and 286 transitions. [2022-10-15 18:14:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-10-15 18:14:01,783 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 4.0) internal successors, (268), 67 states have internal predecessors, (268), 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 137 [2022-10-15 18:14:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:01,785 INFO L225 Difference]: With dead ends: 282 [2022-10-15 18:14:01,785 INFO L226 Difference]: Without dead ends: 282 [2022-10-15 18:14:01,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2022-10-15 18:14:01,800 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:01,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 157 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 18:14:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-10-15 18:14:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-10-15 18:14:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 279 states have (on average 1.025089605734767) internal successors, (286), 281 states have internal predecessors, (286), 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) [2022-10-15 18:14:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 286 transitions. [2022-10-15 18:14:01,809 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 286 transitions. Word has length 137 [2022-10-15 18:14:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:01,810 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 286 transitions. [2022-10-15 18:14:01,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 4.0) internal successors, (268), 67 states have internal predecessors, (268), 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) [2022-10-15 18:14:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 286 transitions. [2022-10-15 18:14:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-10-15 18:14:01,813 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:01,814 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:01,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:02,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-15 18:14:02,028 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:14:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:02,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1714981579, now seen corresponding path program 2 times [2022-10-15 18:14:02,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:02,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028554797] [2022-10-15 18:14:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:02,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 18:14:06,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:06,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028554797] [2022-10-15 18:14:06,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028554797] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:06,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500887841] [2022-10-15 18:14:06,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:14:06,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:06,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:06,758 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:06,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-15 18:14:06,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 18:14:06,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:14:06,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 18:14:06,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2022-10-15 18:14:08,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 18:14:08,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500887841] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 18:14:08,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 18:14:08,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2022-10-15 18:14:08,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886853291] [2022-10-15 18:14:08,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 18:14:08,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 18:14:08,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:08,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 18:14:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2022-10-15 18:14:08,106 INFO L87 Difference]: Start difference. First operand 282 states and 286 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-10-15 18:14:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:08,109 INFO L93 Difference]: Finished difference Result 281 states and 285 transitions. [2022-10-15 18:14:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 18:14:08,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 269 [2022-10-15 18:14:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:08,117 INFO L225 Difference]: With dead ends: 281 [2022-10-15 18:14:08,117 INFO L226 Difference]: Without dead ends: 276 [2022-10-15 18:14:08,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2022-10-15 18:14:08,120 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:08,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-10-15 18:14:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-10-15 18:14:08,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-10-15 18:14:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 274 states have (on average 1.0182481751824817) internal successors, (279), 275 states have internal predecessors, (279), 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) [2022-10-15 18:14:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 279 transitions. [2022-10-15 18:14:08,127 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 279 transitions. Word has length 269 [2022-10-15 18:14:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:08,128 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 279 transitions. [2022-10-15 18:14:08,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-10-15 18:14:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 279 transitions. [2022-10-15 18:14:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-10-15 18:14:08,132 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:08,132 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:08,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:08,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-15 18:14:08,345 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:14:08,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:08,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1668309044, now seen corresponding path program 1 times [2022-10-15 18:14:08,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:08,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6132498] [2022-10-15 18:14:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:08,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8130 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:14:12,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:12,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6132498] [2022-10-15 18:14:12,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6132498] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554689212] [2022-10-15 18:14:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:12,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:12,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:12,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:12,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-15 18:14:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:12,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 66 conjunts are in the unsatisfiable core [2022-10-15 18:14:12,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8130 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:14:13,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 18:14:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8130 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:14:19,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554689212] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 18:14:19,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 18:14:19,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2022-10-15 18:14:19,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686765029] [2022-10-15 18:14:19,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 18:14:19,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-10-15 18:14:19,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 18:14:19,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-10-15 18:14:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2022-10-15 18:14:19,270 INFO L87 Difference]: Start difference. First operand 276 states and 279 transitions. Second operand has 133 states, 133 states have (on average 3.992481203007519) internal successors, (531), 133 states have internal predecessors, (531), 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) [2022-10-15 18:14:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 18:14:20,224 INFO L93 Difference]: Finished difference Result 540 states and 543 transitions. [2022-10-15 18:14:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-10-15 18:14:20,225 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.992481203007519) internal successors, (531), 133 states have internal predecessors, (531), 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 269 [2022-10-15 18:14:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 18:14:20,228 INFO L225 Difference]: With dead ends: 540 [2022-10-15 18:14:20,228 INFO L226 Difference]: Without dead ends: 540 [2022-10-15 18:14:20,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2022-10-15 18:14:20,236 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 585 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-15 18:14:20,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 199 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-15 18:14:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-10-15 18:14:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-10-15 18:14:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.0092936802973977) internal successors, (543), 539 states have internal predecessors, (543), 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) [2022-10-15 18:14:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 543 transitions. [2022-10-15 18:14:20,247 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 543 transitions. Word has length 269 [2022-10-15 18:14:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 18:14:20,248 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 543 transitions. [2022-10-15 18:14:20,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.992481203007519) internal successors, (531), 133 states have internal predecessors, (531), 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) [2022-10-15 18:14:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 543 transitions. [2022-10-15 18:14:20,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-10-15 18:14:20,259 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 18:14:20,260 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 130, 130, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 18:14:20,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-15 18:14:20,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-15 18:14:20,474 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-10-15 18:14:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 18:14:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash 100795974, now seen corresponding path program 2 times [2022-10-15 18:14:20,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 18:14:20,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638065799] [2022-10-15 18:14:20,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 18:14:20,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 18:14:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 18:14:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 33672 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:14:35,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 18:14:35,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638065799] [2022-10-15 18:14:35,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638065799] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 18:14:35,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267972006] [2022-10-15 18:14:35,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 18:14:35,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 18:14:35,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 18:14:35,652 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-15 18:14:35,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-15 18:14:36,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 18:14:36,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 18:14:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 132 conjunts are in the unsatisfiable core [2022-10-15 18:14:36,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 18:14:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 33672 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 18:14:36,804 INFO L328 TraceCheckSpWp]: Computing backward predicates...