/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/reducercommutativity/avg.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:13:50,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:13:50,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:13:50,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:13:50,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:13:50,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:13:50,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:13:50,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:13:50,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:13:50,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:13:50,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:13:50,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:13:50,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:13:50,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:13:50,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:13:50,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:13:50,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:13:50,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:13:50,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:13:50,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:13:50,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:13:50,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:13:50,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:13:50,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:13:50,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-15 17:13:50,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:13:50,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:13:50,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:13:50,685 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 17:13:50,737 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:13:50,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:13:50,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:13:50,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:13:50,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:13:50,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:13:50,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:13:50,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:13:50,742 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:13:50,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:13:50,745 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:13:50,745 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:13:50,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:13:50,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:13:50,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:13:50,746 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:13:50,746 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:13:50,746 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:13:50,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:13:50,747 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:13:50,747 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:13:50,747 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:13:50,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:13:50,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:13:50,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:13:50,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:13:50,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:13:50,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:13:50,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:13:50,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:13:50,749 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:13:51,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:13:51,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:13:51,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:13:51,181 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:13:51,183 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:13:51,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/avg.i [2022-10-15 17:13:51,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3d0960e0/bce2c9212f8a4423b0d5c39b8365cac7/FLAGee6ce57f5 [2022-10-15 17:13:51,849 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:13:51,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg.i [2022-10-15 17:13:51,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3d0960e0/bce2c9212f8a4423b0d5c39b8365cac7/FLAGee6ce57f5 [2022-10-15 17:13:52,270 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3d0960e0/bce2c9212f8a4423b0d5c39b8365cac7 [2022-10-15 17:13:52,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:13:52,280 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:13:52,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:13:52,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:13:52,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:13:52,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d3c2abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52, skipping insertion in model container [2022-10-15 17:13:52,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:13:52,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:13:52,497 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/reducercommutativity/avg.i[1286,1299] [2022-10-15 17:13:52,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:13:52,509 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:13:52,533 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/reducercommutativity/avg.i[1286,1299] [2022-10-15 17:13:52,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:13:52,551 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:13:52,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52 WrapperNode [2022-10-15 17:13:52,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:13:52,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:13:52,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:13:52,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:13:52,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,594 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-10-15 17:13:52,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:13:52,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:13:52,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:13:52,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:13:52,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,626 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:13:52,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:13:52,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:13:52,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:13:52,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (1/1) ... [2022-10-15 17:13:52,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:13:52,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:13:52,673 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 17:13:52,682 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 17:13:52,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:13:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:13:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:13:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:13:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2022-10-15 17:13:52,731 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2022-10-15 17:13:52,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:13:52,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:13:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:13:52,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:13:52,812 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:13:52,814 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:13:53,229 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:13:53,237 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:13:53,238 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-15 17:13:53,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:13:53 BoogieIcfgContainer [2022-10-15 17:13:53,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:13:53,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:13:53,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:13:53,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:13:53,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:13:52" (1/3) ... [2022-10-15 17:13:53,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4910fdc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:13:53, skipping insertion in model container [2022-10-15 17:13:53,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:13:52" (2/3) ... [2022-10-15 17:13:53,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4910fdc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:13:53, skipping insertion in model container [2022-10-15 17:13:53,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:13:53" (3/3) ... [2022-10-15 17:13:53,251 INFO L112 eAbstractionObserver]: Analyzing ICFG avg.i [2022-10-15 17:13:53,272 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:13:53,273 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-10-15 17:13:53,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:13:53,362 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;@13b2f1d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:13:53,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-10-15 17:13:53,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 53 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:13:53,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:13:53,376 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:13:53,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:13:53,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:13:53,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:13:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash 47837458, now seen corresponding path program 1 times [2022-10-15 17:13:53,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:13:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405389501] [2022-10-15 17:13:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:53,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:13:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:13:53,631 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 17:13:53,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:13:53,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405389501] [2022-10-15 17:13:53,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405389501] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:13:53,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:13:53,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:13:53,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556462341] [2022-10-15 17:13:53,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:13:53,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:13:53,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:13:53,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:13:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:13:53,695 INFO L87 Difference]: Start difference. First operand has 58 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 53 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 17:13:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:13:53,835 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-10-15 17:13:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:13:53,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-10-15 17:13:53,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:13:53,849 INFO L225 Difference]: With dead ends: 60 [2022-10-15 17:13:53,849 INFO L226 Difference]: Without dead ends: 56 [2022-10-15 17:13:53,851 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 17:13:53,858 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:13:53,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 96 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:13:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-10-15 17:13:53,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-10-15 17:13:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.65625) internal successors, (53), 51 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:13:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-10-15 17:13:53,920 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 5 [2022-10-15 17:13:53,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:13:53,920 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-10-15 17:13:53,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 17:13:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-10-15 17:13:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:13:53,922 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:13:53,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:13:53,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:13:53,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:13:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:13:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1326341730, now seen corresponding path program 1 times [2022-10-15 17:13:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:13:53,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526176683] [2022-10-15 17:13:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:53,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:13:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:13:54,143 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 17:13:54,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:13:54,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526176683] [2022-10-15 17:13:54,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526176683] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:13:54,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:13:54,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:13:54,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844189275] [2022-10-15 17:13:54,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:13:54,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:13:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:13:54,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:13:54,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:13:54,150 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:13:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:13:54,265 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-10-15 17:13:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:13:54,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:13:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:13:54,268 INFO L225 Difference]: With dead ends: 47 [2022-10-15 17:13:54,268 INFO L226 Difference]: Without dead ends: 47 [2022-10-15 17:13:54,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:13:54,271 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:13:54,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 62 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:13:54,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-15 17:13:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-10-15 17:13:54,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.375) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:13:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-10-15 17:13:54,280 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 7 [2022-10-15 17:13:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:13:54,280 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-10-15 17:13:54,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:13:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-10-15 17:13:54,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:13:54,281 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:13:54,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:13:54,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:13:54,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:13:54,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:13:54,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1326341729, now seen corresponding path program 1 times [2022-10-15 17:13:54,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:13:54,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020546277] [2022-10-15 17:13:54,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:54,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:13:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:13:54,525 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 17:13:54,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:13:54,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020546277] [2022-10-15 17:13:54,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020546277] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:13:54,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:13:54,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:13:54,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176573110] [2022-10-15 17:13:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:13:54,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:13:54,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:13:54,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:13:54,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:13:54,529 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:13:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:13:54,643 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-10-15 17:13:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:13:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:13:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:13:54,647 INFO L225 Difference]: With dead ends: 49 [2022-10-15 17:13:54,647 INFO L226 Difference]: Without dead ends: 49 [2022-10-15 17:13:54,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:13:54,649 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:13:54,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 64 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:13:54,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-15 17:13:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-10-15 17:13:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:13:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-10-15 17:13:54,661 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 7 [2022-10-15 17:13:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:13:54,661 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-10-15 17:13:54,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:13:54,662 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-10-15 17:13:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-15 17:13:54,663 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:13:54,663 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:13:54,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:13:54,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:13:54,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:13:54,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1243400926, now seen corresponding path program 1 times [2022-10-15 17:13:54,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:13:54,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059974628] [2022-10-15 17:13:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:54,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:13:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:13:54,963 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 17:13:54,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:13:54,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059974628] [2022-10-15 17:13:54,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059974628] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:13:54,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695216273] [2022-10-15 17:13:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:54,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:13:54,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:13:54,971 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 17:13:54,991 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 17:13:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:13:55,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 17:13:55,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:13:55,129 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 17:13:55,235 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 17:13:55,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:13:55,406 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 17:13:55,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695216273] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:13:55,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:13:55,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-15 17:13:55,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20969341] [2022-10-15 17:13:55,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:13:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 17:13:55,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:13:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 17:13:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:13:55,409 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 11 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:13:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:13:55,620 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2022-10-15 17:13:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:13:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-15 17:13:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:13:55,622 INFO L225 Difference]: With dead ends: 56 [2022-10-15 17:13:55,623 INFO L226 Difference]: Without dead ends: 56 [2022-10-15 17:13:55,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:13:55,625 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 82 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:13:55,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 126 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-15 17:13:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-10-15 17:13:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-10-15 17:13:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.236842105263158) internal successors, (47), 43 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:13:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-10-15 17:13:55,634 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 11 [2022-10-15 17:13:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:13:55,635 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-10-15 17:13:55,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:13:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-10-15 17:13:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 17:13:55,636 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:13:55,636 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 17:13:55,665 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 17:13:55,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:13:55,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:13:55,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:13:55,854 INFO L85 PathProgramCache]: Analyzing trace with hash -116830427, now seen corresponding path program 2 times [2022-10-15 17:13:55,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:13:55,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304601266] [2022-10-15 17:13:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:55,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:13:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:13:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:13:56,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:13:56,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304601266] [2022-10-15 17:13:56,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304601266] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:13:56,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458724441] [2022-10-15 17:13:56,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:13:56,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:13:56,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:13:56,066 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 17:13:56,085 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 17:13:56,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:13:56,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:13:56,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 17:13:56,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:13:56,132 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 17:13:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:13:56,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:13:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:13:56,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458724441] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:13:56,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:13:56,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-10-15 17:13:56,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500363365] [2022-10-15 17:13:56,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:13:56,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-15 17:13:56,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:13:56,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-15 17:13:56,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-10-15 17:13:56,715 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:13:57,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:13:57,228 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-10-15 17:13:57,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 17:13:57,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-15 17:13:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:13:57,230 INFO L225 Difference]: With dead ends: 55 [2022-10-15 17:13:57,231 INFO L226 Difference]: Without dead ends: 55 [2022-10-15 17:13:57,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-10-15 17:13:57,232 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 99 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:13:57,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 116 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-15 17:13:57,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-15 17:13:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2022-10-15 17:13:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.1875) internal successors, (38), 36 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:13:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-10-15 17:13:57,240 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2022-10-15 17:13:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:13:57,240 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-10-15 17:13:57,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:13:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-10-15 17:13:57,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-15 17:13:57,242 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:13:57,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:13:57,282 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 17:13:57,457 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 17:13:57,458 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:13:57,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:13:57,459 INFO L85 PathProgramCache]: Analyzing trace with hash -766621773, now seen corresponding path program 1 times [2022-10-15 17:13:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:13:57,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115046376] [2022-10-15 17:13:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:57,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:13:57,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:13:57,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126380327] [2022-10-15 17:13:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:57,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:13:57,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:13:57,484 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 17:13:57,502 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 17:13:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:13:57,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-15 17:13:57,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:13:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-15 17:13:57,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:13:57,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:13:57,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115046376] [2022-10-15 17:13:57,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:13:57,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126380327] [2022-10-15 17:13:57,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126380327] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:13:57,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:13:57,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:13:57,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949997475] [2022-10-15 17:13:57,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:13:57,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 17:13:57,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:13:57,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 17:13:57,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:13:57,609 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 17:13:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:13:57,656 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-10-15 17:13:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:13:57,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-10-15 17:13:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:13:57,658 INFO L225 Difference]: With dead ends: 45 [2022-10-15 17:13:57,658 INFO L226 Difference]: Without dead ends: 45 [2022-10-15 17:13:57,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 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 17:13:57,663 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:13:57,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 60 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:13:57,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-15 17:13:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-10-15 17:13:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 37 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:13:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-10-15 17:13:57,675 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 27 [2022-10-15 17:13:57,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:13:57,678 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-10-15 17:13:57,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 17:13:57,679 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-10-15 17:13:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-15 17:13:57,683 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:13:57,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:13:57,725 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 17:13:57,896 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 17:13:57,897 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:13:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:13:57,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1918018131, now seen corresponding path program 1 times [2022-10-15 17:13:57,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:13:57,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671382352] [2022-10-15 17:13:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:57,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:13:57,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:13:57,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562171685] [2022-10-15 17:13:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:57,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:13:57,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:13:57,913 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 17:13:57,935 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 17:13:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:13:57,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 17:13:57,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:13:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-15 17:13:58,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:13:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-15 17:13:58,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:13:58,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671382352] [2022-10-15 17:13:58,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:13:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562171685] [2022-10-15 17:13:58,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562171685] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:13:58,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:13:58,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2022-10-15 17:13:58,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351182803] [2022-10-15 17:13:58,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:13:58,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:13:58,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:13:58,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:13:58,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:13:58,154 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-15 17:13:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:13:58,228 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-10-15 17:13:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-15 17:13:58,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-10-15 17:13:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:13:58,230 INFO L225 Difference]: With dead ends: 49 [2022-10-15 17:13:58,234 INFO L226 Difference]: Without dead ends: 49 [2022-10-15 17:13:58,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:13:58,241 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 53 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:13:58,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 111 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:13:58,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-15 17:13:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-10-15 17:13:58,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.162162162162162) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:13:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-10-15 17:13:58,255 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 35 [2022-10-15 17:13:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:13:58,256 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-10-15 17:13:58,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-15 17:13:58,256 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-10-15 17:13:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-15 17:13:58,260 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:13:58,260 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:13:58,293 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 17:13:58,475 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 17:13:58,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:13:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:13:58,476 INFO L85 PathProgramCache]: Analyzing trace with hash -774669837, now seen corresponding path program 2 times [2022-10-15 17:13:58,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:13:58,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807787603] [2022-10-15 17:13:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:58,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:13:58,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:13:58,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491632428] [2022-10-15 17:13:58,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:13:58,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:13:58,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:13:58,513 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 17:13:58,515 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 17:13:58,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 17:13:58,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:13:58,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-15 17:13:58,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:13:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-10-15 17:13:58,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:13:58,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:13:58,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807787603] [2022-10-15 17:13:58,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:13:58,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491632428] [2022-10-15 17:13:58,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491632428] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:13:58,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:13:58,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:13:58,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004945365] [2022-10-15 17:13:58,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:13:58,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 17:13:58,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:13:58,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 17:13:58,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:13:58,635 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 17:13:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:13:58,674 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-10-15 17:13:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:13:58,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-10-15 17:13:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:13:58,676 INFO L225 Difference]: With dead ends: 53 [2022-10-15 17:13:58,676 INFO L226 Difference]: Without dead ends: 53 [2022-10-15 17:13:58,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 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 17:13:58,677 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:13:58,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 54 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:13:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-15 17:13:58,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2022-10-15 17:13:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:13:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-10-15 17:13:58,689 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2022-10-15 17:13:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:13:58,692 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-10-15 17:13:58,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-15 17:13:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-10-15 17:13:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-15 17:13:58,694 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:13:58,694 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:13:58,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-10-15 17:13:58,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:13:58,913 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:13:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:13:58,914 INFO L85 PathProgramCache]: Analyzing trace with hash -774669787, now seen corresponding path program 1 times [2022-10-15 17:13:58,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:13:58,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056703424] [2022-10-15 17:13:58,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:58,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:13:58,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:13:58,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517432939] [2022-10-15 17:13:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:58,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:13:58,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:13:58,945 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 17:13:58,951 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 17:13:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:13:59,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-15 17:13:59,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:13:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-15 17:13:59,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:13:59,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:13:59,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056703424] [2022-10-15 17:13:59,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:13:59,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517432939] [2022-10-15 17:13:59,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517432939] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:13:59,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:13:59,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 17:13:59,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109062036] [2022-10-15 17:13:59,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:13:59,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 17:13:59,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:13:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 17:13:59,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:13:59,237 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 17:13:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:13:59,305 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2022-10-15 17:13:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:13:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-10-15 17:13:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:13:59,307 INFO L225 Difference]: With dead ends: 64 [2022-10-15 17:13:59,307 INFO L226 Difference]: Without dead ends: 64 [2022-10-15 17:13:59,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:13:59,309 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:13:59,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 89 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-10-15 17:13:59,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-15 17:13:59,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-10-15 17:13:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 56 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:13:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-10-15 17:13:59,315 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 43 [2022-10-15 17:13:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:13:59,316 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-10-15 17:13:59,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-15 17:13:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-10-15 17:13:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-15 17:13:59,318 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:13:59,318 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:13:59,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-10-15 17:13:59,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:13:59,532 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:13:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:13:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash -933301141, now seen corresponding path program 1 times [2022-10-15 17:13:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:13:59,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371084992] [2022-10-15 17:13:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:59,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:13:59,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:13:59,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365560989] [2022-10-15 17:13:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:13:59,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:13:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:13:59,549 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 17:13:59,552 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 17:13:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:13:59,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 17:13:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:14:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-15 17:14:00,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:14:00,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-10-15 17:14:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-15 17:14:00,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:14:00,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371084992] [2022-10-15 17:14:00,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:14:00,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365560989] [2022-10-15 17:14:00,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365560989] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:14:00,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:14:00,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2022-10-15 17:14:00,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274936812] [2022-10-15 17:14:00,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:14:00,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-15 17:14:00,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:14:00,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-15 17:14:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-10-15 17:14:00,282 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 18 states, 15 states have (on average 5.2) internal successors, (78), 17 states have internal predecessors, (78), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 17:14:00,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:14:00,621 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2022-10-15 17:14:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-10-15 17:14:00,622 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 5.2) internal successors, (78), 17 states have internal predecessors, (78), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 48 [2022-10-15 17:14:00,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:14:00,624 INFO L225 Difference]: With dead ends: 145 [2022-10-15 17:14:00,624 INFO L226 Difference]: Without dead ends: 145 [2022-10-15 17:14:00,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2022-10-15 17:14:00,626 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 265 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:14:00,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 120 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 184 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2022-10-15 17:14:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-10-15 17:14:00,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 61. [2022-10-15 17:14:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-15 17:14:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-10-15 17:14:00,648 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 48 [2022-10-15 17:14:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:14:00,651 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-10-15 17:14:00,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 5.2) internal successors, (78), 17 states have internal predecessors, (78), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-15 17:14:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-10-15 17:14:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-15 17:14:00,655 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:14:00,656 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:14:00,697 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 17:14:00,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:14:00,856 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:14:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:14:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash -933301091, now seen corresponding path program 1 times [2022-10-15 17:14:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:14:00,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110087433] [2022-10-15 17:14:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:14:00,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:14:00,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:14:00,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091835266] [2022-10-15 17:14:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:14:00,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:14:00,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:14:00,883 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 17:14:00,909 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 17:14:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:14:00,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-15 17:14:00,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:14:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-15 17:14:01,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:14:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-15 17:14:01,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:14:01,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110087433] [2022-10-15 17:14:01,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:14:01,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091835266] [2022-10-15 17:14:01,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091835266] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:14:01,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:14:01,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-10-15 17:14:01,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511945993] [2022-10-15 17:14:01,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:14:01,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-15 17:14:01,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:14:01,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-15 17:14:01,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-10-15 17:14:01,188 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-15 17:14:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:14:01,339 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2022-10-15 17:14:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 17:14:01,340 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-10-15 17:14:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:14:01,342 INFO L225 Difference]: With dead ends: 136 [2022-10-15 17:14:01,342 INFO L226 Difference]: Without dead ends: 136 [2022-10-15 17:14:01,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:14:01,343 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 48 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:14:01,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 197 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:14:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-10-15 17:14:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 114. [2022-10-15 17:14:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 101 states have (on average 1.099009900990099) internal successors, (111), 104 states have internal predecessors, (111), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-15 17:14:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2022-10-15 17:14:01,352 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 48 [2022-10-15 17:14:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:14:01,352 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2022-10-15 17:14:01,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-15 17:14:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2022-10-15 17:14:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-10-15 17:14:01,354 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:14:01,354 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:14:01,395 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 17:14:01,569 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,SelfDestructingSolverStorable10 [2022-10-15 17:14:01,570 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:14:01,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:14:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1729168381, now seen corresponding path program 2 times [2022-10-15 17:14:01,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:14:01,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272337916] [2022-10-15 17:14:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:14:01,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:14:01,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:14:01,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485795975] [2022-10-15 17:14:01,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:14:01,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:14:01,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:14:01,593 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 17:14:01,603 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 17:14:01,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:14:01,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:14:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-15 17:14:01,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:14:01,704 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 17:14:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-10-15 17:14:01,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:14:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-10-15 17:14:02,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:14:02,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272337916] [2022-10-15 17:14:02,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-15 17:14:02,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485795975] [2022-10-15 17:14:02,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485795975] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:14:02,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-15 17:14:02,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-10-15 17:14:02,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721293009] [2022-10-15 17:14:02,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-15 17:14:02,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 17:14:02,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:14:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 17:14:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:14:02,289 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-15 17:14:02,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:14:02,396 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2022-10-15 17:14:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-15 17:14:02,397 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-10-15 17:14:02,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:14:02,398 INFO L225 Difference]: With dead ends: 134 [2022-10-15 17:14:02,399 INFO L226 Difference]: Without dead ends: 134 [2022-10-15 17:14:02,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:14:02,400 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:14:02,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 68 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-10-15 17:14:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-10-15 17:14:02,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2022-10-15 17:14:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 100 states have (on average 1.08) internal successors, (108), 101 states have internal predecessors, (108), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-15 17:14:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2022-10-15 17:14:02,409 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 56 [2022-10-15 17:14:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:14:02,410 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2022-10-15 17:14:02,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-15 17:14:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2022-10-15 17:14:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-10-15 17:14:02,412 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:14:02,412 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:14:02,454 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 17:14:02,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:14:02,613 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [avgErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, avgErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-10-15 17:14:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:14:02,614 INFO L85 PathProgramCache]: Analyzing trace with hash 523529600, now seen corresponding path program 1 times [2022-10-15 17:14:02,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:14:02,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642393308] [2022-10-15 17:14:02,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:14:02,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:14:02,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-15 17:14:02,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470406991] [2022-10-15 17:14:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:14:02,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:14:02,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:14:02,631 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 17:14:02,659 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 17:14:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:14:02,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 120 conjunts are in the unsatisfiable core [2022-10-15 17:14:02,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:14:18,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:14:18,513 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 17:14:18,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 267 treesize of output 142 [2022-10-15 17:14:29,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:14:29,800 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-15 17:14:29,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 142 [2022-10-15 17:15:01,434 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)