./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b9dfe2826dbd43b76a93fbf593c8a07947a4c894 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:51:06,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:51:06,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:51:06,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:51:06,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:51:06,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:51:06,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:51:06,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:51:06,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:51:06,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:51:06,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:51:06,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:51:06,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:51:06,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:51:06,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:51:06,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:51:06,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:51:06,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:51:06,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:51:06,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:51:06,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:51:06,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:51:06,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:51:06,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:51:06,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:51:06,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:51:06,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:51:06,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:51:06,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:51:06,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:51:06,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:51:06,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:51:06,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:51:06,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:51:06,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:51:06,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:51:06,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:51:06,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:51:06,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:51:06,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:51:06,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:51:06,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-08-30 16:51:06,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:51:06,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:51:06,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:51:06,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:51:06,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:51:06,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:51:06,679 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:51:06,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:51:06,680 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:51:06,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:51:06,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:51:06,681 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:51:06,681 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:51:06,682 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 16:51:06,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:51:06,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:51:06,682 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:51:06,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:51:06,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:51:06,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:51:06,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:51:06,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:51:06,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:51:06,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 16:51:06,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 16:51:06,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:51:06,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9dfe2826dbd43b76a93fbf593c8a07947a4c894 [2021-08-30 16:51:06,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:51:06,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:51:06,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:51:06,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:51:06,966 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:51:06,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2021-08-30 16:51:07,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c7331d95/2a238610ad764094b1b6dbef459b9426/FLAG8d47fa92f [2021-08-30 16:51:07,356 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:51:07,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/LexIndexValue-Array-1.c [2021-08-30 16:51:07,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c7331d95/2a238610ad764094b1b6dbef459b9426/FLAG8d47fa92f [2021-08-30 16:51:07,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c7331d95/2a238610ad764094b1b6dbef459b9426 [2021-08-30 16:51:07,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:51:07,383 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:51:07,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:51:07,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:51:07,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:51:07,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:51:07" (1/1) ... [2021-08-30 16:51:07,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d9aab18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:07, skipping insertion in model container [2021-08-30 16:51:07,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:51:07" (1/1) ... [2021-08-30 16:51:07,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:51:07,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:51:07,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:51:07,506 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 16:51:07,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:51:07,526 INFO L208 MainTranslator]: Completed translation [2021-08-30 16:51:07,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:07 WrapperNode [2021-08-30 16:51:07,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:51:07,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 16:51:07,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 16:51:07,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 16:51:07,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:07" (1/1) ... [2021-08-30 16:51:07,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:07" (1/1) ... [2021-08-30 16:51:07,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:07" (1/1) ... [2021-08-30 16:51:07,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:07" (1/1) ... [2021-08-30 16:51:07,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:07" (1/1) ... [2021-08-30 16:51:07,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:07" (1/1) ... [2021-08-30 16:51:07,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:07" (1/1) ... [2021-08-30 16:51:07,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 16:51:07,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 16:51:07,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 16:51:07,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 16:51:07,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:07" (1/1) ... [2021-08-30 16:51:07,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:51:07,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:51:07,588 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) [2021-08-30 16:51:07,607 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 [2021-08-30 16:51:07,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 16:51:07,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 16:51:07,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 16:51:07,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 16:51:07,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 16:51:07,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 16:51:07,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 16:51:07,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 16:51:07,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 16:51:07,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 16:51:07,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 16:51:07,779 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 16:51:07,780 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-30 16:51:07,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:51:07 BoogieIcfgContainer [2021-08-30 16:51:07,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 16:51:07,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 16:51:07,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 16:51:07,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 16:51:07,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:51:07" (1/3) ... [2021-08-30 16:51:07,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418653d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:51:07, skipping insertion in model container [2021-08-30 16:51:07,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:51:07" (2/3) ... [2021-08-30 16:51:07,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418653d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:51:07, skipping insertion in model container [2021-08-30 16:51:07,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:51:07" (3/3) ... [2021-08-30 16:51:07,788 INFO L111 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Array-1.c [2021-08-30 16:51:07,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 16:51:07,791 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-08-30 16:51:07,823 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 16:51:07,830 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-30 16:51:07,830 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-08-30 16:51:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.75) internal successors, (35), 29 states have internal predecessors, (35), 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) [2021-08-30 16:51:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-30 16:51:07,846 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:07,846 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:07,847 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:51:07,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:07,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1038673271, now seen corresponding path program 1 times [2021-08-30 16:51:07,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:07,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234689138] [2021-08-30 16:51:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:07,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:08,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:51:08,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:08,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234689138] [2021-08-30 16:51:08,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234689138] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:51:08,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:51:08,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:51:08,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867593564] [2021-08-30 16:51:08,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:51:08,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:08,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:51:08,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:51:08,073 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.75) internal successors, (35), 29 states have internal predecessors, (35), 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) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:08,175 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-08-30 16:51:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:51:08,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-08-30 16:51:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:08,181 INFO L225 Difference]: With dead ends: 39 [2021-08-30 16:51:08,193 INFO L226 Difference]: Without dead ends: 36 [2021-08-30 16:51:08,194 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.56ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:51:08,197 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.10ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:08,197 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 101 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 88.10ms Time] [2021-08-30 16:51:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-30 16:51:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-08-30 16:51:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.619047619047619) internal successors, (34), 29 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:08,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-08-30 16:51:08,234 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 8 [2021-08-30 16:51:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:08,235 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-08-30 16:51:08,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:08,235 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-08-30 16:51:08,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-30 16:51:08,235 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:08,236 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:08,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 16:51:08,236 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:51:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:08,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1038673272, now seen corresponding path program 1 times [2021-08-30 16:51:08,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:08,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803251956] [2021-08-30 16:51:08,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:08,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:08,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:51:08,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:08,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803251956] [2021-08-30 16:51:08,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803251956] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:51:08,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:51:08,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:51:08,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346338847] [2021-08-30 16:51:08,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:51:08,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:51:08,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:51:08,296 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:08,362 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-08-30 16:51:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:51:08,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-08-30 16:51:08,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:08,363 INFO L225 Difference]: With dead ends: 29 [2021-08-30 16:51:08,363 INFO L226 Difference]: Without dead ends: 29 [2021-08-30 16:51:08,363 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.36ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:51:08,364 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.75ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.48ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:08,365 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 7 Invalid, 62 Unknown, 0 Unchecked, 0.75ms Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 61.48ms Time] [2021-08-30 16:51:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-30 16:51:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-30 16:51:08,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-08-30 16:51:08,385 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 8 [2021-08-30 16:51:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:08,386 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-08-30 16:51:08,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-08-30 16:51:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 16:51:08,387 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:08,387 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:08,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 16:51:08,388 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:51:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:08,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1416659532, now seen corresponding path program 1 times [2021-08-30 16:51:08,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:08,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759858070] [2021-08-30 16:51:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:08,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:08,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:51:08,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:08,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759858070] [2021-08-30 16:51:08,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759858070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:51:08,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136143095] [2021-08-30 16:51:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:08,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:08,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:51:08,525 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) [2021-08-30 16:51:08,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 16:51:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:08,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 16:51:08,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:51:08,673 INFO L388 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 [2021-08-30 16:51:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:51:08,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:51:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:51:08,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136143095] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:51:08,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:51:08,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2021-08-30 16:51:08,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405363030] [2021-08-30 16:51:08,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 16:51:08,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 16:51:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-30 16:51:08,874 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:08,984 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-08-30 16:51:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:51:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-30 16:51:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:08,988 INFO L225 Difference]: With dead ends: 39 [2021-08-30 16:51:08,988 INFO L226 Difference]: Without dead ends: 39 [2021-08-30 16:51:08,989 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.72ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:51:08,991 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.98ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.03ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:08,992 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 16 Invalid, 163 Unknown, 0 Unchecked, 4.98ms Time], IncrementalHoareTripleChecker [14 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 76.03ms Time] [2021-08-30 16:51:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-30 16:51:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-30 16:51:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-30 16:51:08,999 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 12 [2021-08-30 16:51:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:09,000 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-30 16:51:09,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-30 16:51:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 16:51:09,001 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:09,001 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:09,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-30 16:51:09,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:09,218 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:51:09,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:09,219 INFO L82 PathProgramCache]: Analyzing trace with hash -186937404, now seen corresponding path program 1 times [2021-08-30 16:51:09,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:09,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506792894] [2021-08-30 16:51:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:09,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:09,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 16:51:09,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:09,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506792894] [2021-08-30 16:51:09,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506792894] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:51:09,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:51:09,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:51:09,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833658304] [2021-08-30 16:51:09,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:51:09,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:09,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:51:09,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:51:09,281 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:09,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:09,327 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-08-30 16:51:09,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:51:09,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-08-30 16:51:09,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:09,328 INFO L225 Difference]: With dead ends: 50 [2021-08-30 16:51:09,328 INFO L226 Difference]: Without dead ends: 50 [2021-08-30 16:51:09,328 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.54ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:51:09,329 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.66ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.00ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:09,329 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 7 Invalid, 75 Unknown, 0 Unchecked, 0.66ms Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 42.00ms Time] [2021-08-30 16:51:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-30 16:51:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-08-30 16:51:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-08-30 16:51:09,332 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 26 [2021-08-30 16:51:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:09,333 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-08-30 16:51:09,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-08-30 16:51:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 16:51:09,333 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:09,334 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:09,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 16:51:09,334 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:51:09,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash 741968551, now seen corresponding path program 1 times [2021-08-30 16:51:09,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:09,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983359920] [2021-08-30 16:51:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:09,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:09,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 16:51:09,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:09,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983359920] [2021-08-30 16:51:09,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983359920] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:51:09,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:51:09,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:51:09,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870565544] [2021-08-30 16:51:09,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:51:09,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:09,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:51:09,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:51:09,403 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:09,466 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-08-30 16:51:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:51:09,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-08-30 16:51:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:09,468 INFO L225 Difference]: With dead ends: 52 [2021-08-30 16:51:09,468 INFO L226 Difference]: Without dead ends: 52 [2021-08-30 16:51:09,468 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.85ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:51:09,470 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.66ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.72ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:09,470 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 97 Unknown, 0 Unchecked, 0.66ms Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 52.72ms Time] [2021-08-30 16:51:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-30 16:51:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-08-30 16:51:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:09,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-08-30 16:51:09,483 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 28 [2021-08-30 16:51:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:09,483 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-08-30 16:51:09,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-08-30 16:51:09,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 16:51:09,489 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:09,489 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:09,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 16:51:09,489 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:51:09,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:09,490 INFO L82 PathProgramCache]: Analyzing trace with hash -113674038, now seen corresponding path program 1 times [2021-08-30 16:51:09,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:09,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561623383] [2021-08-30 16:51:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:09,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:09,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:51:09,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:09,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561623383] [2021-08-30 16:51:09,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561623383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:51:09,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567192717] [2021-08-30 16:51:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:09,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:09,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:51:09,572 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) [2021-08-30 16:51:09,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 16:51:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:09,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 16:51:09,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:51:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:51:09,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:51:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:51:09,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567192717] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:51:09,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:51:09,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-08-30 16:51:09,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560899561] [2021-08-30 16:51:09,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-30 16:51:09,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:09,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-30 16:51:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-08-30 16:51:09,799 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:09,867 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-08-30 16:51:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 16:51:09,867 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-08-30 16:51:09,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:09,868 INFO L225 Difference]: With dead ends: 73 [2021-08-30 16:51:09,868 INFO L226 Difference]: Without dead ends: 73 [2021-08-30 16:51:09,868 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 49.90ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-08-30 16:51:09,869 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.99ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:09,869 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 10 Invalid, 140 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 60.99ms Time] [2021-08-30 16:51:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-30 16:51:09,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-08-30 16:51:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-08-30 16:51:09,872 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 30 [2021-08-30 16:51:09,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:09,873 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-08-30 16:51:09,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-08-30 16:51:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-30 16:51:09,874 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:09,874 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:09,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 16:51:10,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-30 16:51:10,095 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:51:10,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:10,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1811959972, now seen corresponding path program 2 times [2021-08-30 16:51:10,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:10,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463097007] [2021-08-30 16:51:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:10,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:10,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:51:10,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:10,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463097007] [2021-08-30 16:51:10,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463097007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:51:10,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301018775] [2021-08-30 16:51:10,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:51:10,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:10,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:51:10,217 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) [2021-08-30 16:51:10,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 16:51:10,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 16:51:10,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:51:10,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 16:51:10,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:51:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-30 16:51:10,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 16:51:10,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301018775] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:51:10,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 16:51:10,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 17 [2021-08-30 16:51:10,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976217087] [2021-08-30 16:51:10,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:51:10,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:10,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:51:10,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-08-30 16:51:10,479 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:10,506 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2021-08-30 16:51:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:51:10,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-08-30 16:51:10,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:10,507 INFO L225 Difference]: With dead ends: 72 [2021-08-30 16:51:10,508 INFO L226 Difference]: Without dead ends: 70 [2021-08-30 16:51:10,508 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 77.99ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-08-30 16:51:10,508 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.41ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 24.46ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:10,509 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 5 Invalid, 58 Unknown, 0 Unchecked, 0.41ms Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 2 Unchecked, 24.46ms Time] [2021-08-30 16:51:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-30 16:51:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-30 16:51:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.109375) internal successors, (71), 66 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-08-30 16:51:10,512 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 54 [2021-08-30 16:51:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:10,512 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-08-30 16:51:10,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-08-30 16:51:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-30 16:51:10,513 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:10,513 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:10,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 16:51:10,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:10,730 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:51:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1830410739, now seen corresponding path program 1 times [2021-08-30 16:51:10,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:10,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441593897] [2021-08-30 16:51:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:10,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:10,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 16:51:10,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:10,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441593897] [2021-08-30 16:51:10,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441593897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:51:10,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819074755] [2021-08-30 16:51:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:10,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:10,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:51:10,840 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) [2021-08-30 16:51:10,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 16:51:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-30 16:51:10,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:51:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 16:51:10,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:51:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 16:51:11,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819074755] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:51:11,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:51:11,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2021-08-30 16:51:11,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539728235] [2021-08-30 16:51:11,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-30 16:51:11,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:11,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-30 16:51:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-08-30 16:51:11,229 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:11,366 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-08-30 16:51:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-30 16:51:11,366 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-08-30 16:51:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:11,367 INFO L225 Difference]: With dead ends: 118 [2021-08-30 16:51:11,367 INFO L226 Difference]: Without dead ends: 118 [2021-08-30 16:51:11,368 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 199.78ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-08-30 16:51:11,368 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 99 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.60ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.71ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:11,368 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 19 Invalid, 238 Unknown, 0 Unchecked, 1.60ms Time], IncrementalHoareTripleChecker [17 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 122.71ms Time] [2021-08-30 16:51:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-30 16:51:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-08-30 16:51:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.0625) internal successors, (119), 114 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-08-30 16:51:11,373 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 56 [2021-08-30 16:51:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:11,373 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-08-30 16:51:11,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-08-30 16:51:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-08-30 16:51:11,374 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:11,374 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:11,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-30 16:51:11,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:11,610 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:51:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:11,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1725175857, now seen corresponding path program 2 times [2021-08-30 16:51:11,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:11,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136036654] [2021-08-30 16:51:11,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:11,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:11,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 16:51:11,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:11,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136036654] [2021-08-30 16:51:11,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136036654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:51:11,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796885497] [2021-08-30 16:51:11,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:51:11,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:11,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:51:11,941 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) [2021-08-30 16:51:11,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 16:51:12,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:51:12,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:51:12,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-30 16:51:12,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:51:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 16:51:12,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:51:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 16:51:12,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796885497] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:51:12,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:51:12,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2021-08-30 16:51:12,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080143635] [2021-08-30 16:51:12,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-30 16:51:12,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:12,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-30 16:51:12,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-08-30 16:51:12,918 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 50 states, 50 states have (on average 3.9) internal successors, (195), 49 states have internal predecessors, (195), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:13,120 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2021-08-30 16:51:13,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-30 16:51:13,121 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.9) internal successors, (195), 49 states have internal predecessors, (195), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-08-30 16:51:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:13,122 INFO L225 Difference]: With dead ends: 214 [2021-08-30 16:51:13,122 INFO L226 Difference]: Without dead ends: 214 [2021-08-30 16:51:13,122 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 691.93ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-08-30 16:51:13,123 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 138 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.22ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:13,123 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 16 Invalid, 332 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [29 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 178.22ms Time] [2021-08-30 16:51:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-30 16:51:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-08-30 16:51:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.0336538461538463) internal successors, (215), 210 states have internal predecessors, (215), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 218 transitions. [2021-08-30 16:51:13,136 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 218 transitions. Word has length 104 [2021-08-30 16:51:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:13,137 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 218 transitions. [2021-08-30 16:51:13,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.9) internal successors, (195), 49 states have internal predecessors, (195), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 218 transitions. [2021-08-30 16:51:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-08-30 16:51:13,142 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:51:13,142 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:51:13,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-30 16:51:13,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:13,358 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 4 more)] === [2021-08-30 16:51:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:51:13,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1400310663, now seen corresponding path program 3 times [2021-08-30 16:51:13,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:51:13,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895728928] [2021-08-30 16:51:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:51:13,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:51:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:14,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:51:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:51:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-30 16:51:14,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:51:14,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895728928] [2021-08-30 16:51:14,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895728928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:51:14,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20721516] [2021-08-30 16:51:14,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:51:14,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:14,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:51:14,275 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) [2021-08-30 16:51:14,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 16:51:14,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-30 16:51:14,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:51:14,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 16:51:14,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:51:14,330 INFO L388 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 [2021-08-30 16:51:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2021-08-30 16:51:15,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 16:51:15,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20721516] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:51:15,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 16:51:15,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [50] total 54 [2021-08-30 16:51:15,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238681781] [2021-08-30 16:51:15,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:51:15,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:51:15,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:51:15,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=1671, Unknown=0, NotChecked=0, Total=2862 [2021-08-30 16:51:15,432 INFO L87 Difference]: Start difference. First operand 214 states and 218 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:51:15,510 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2021-08-30 16:51:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:51:15,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2021-08-30 16:51:15,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:51:15,511 INFO L225 Difference]: With dead ends: 214 [2021-08-30 16:51:15,511 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 16:51:15,512 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 840.61ms TimeCoverageRelationStatistics Valid=1197, Invalid=1773, Unknown=0, NotChecked=0, Total=2970 [2021-08-30 16:51:15,513 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.65ms IncrementalHoareTripleChecker+Time [2021-08-30 16:51:15,514 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 6 Invalid, 87 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 37.65ms Time] [2021-08-30 16:51:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 16:51:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 16:51:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-08-30 16:51:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 16:51:15,515 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 200 [2021-08-30 16:51:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:51:15,515 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 16:51:15,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:51:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 16:51:15,515 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 16:51:15,517 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (8 of 9 remaining) [2021-08-30 16:51:15,517 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (7 of 9 remaining) [2021-08-30 16:51:15,517 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (6 of 9 remaining) [2021-08-30 16:51:15,517 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (5 of 9 remaining) [2021-08-30 16:51:15,517 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION (4 of 9 remaining) [2021-08-30 16:51:15,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION (3 of 9 remaining) [2021-08-30 16:51:15,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION (2 of 9 remaining) [2021-08-30 16:51:15,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION (1 of 9 remaining) [2021-08-30 16:51:15,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2021-08-30 16:51:15,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 16:51:15,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:51:15,739 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 16:51:15,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:51:15 BoogieIcfgContainer [2021-08-30 16:51:15,740 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 16:51:15,741 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 16:51:15,741 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 16:51:15,741 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 16:51:15,741 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:51:07" (3/4) ... [2021-08-30 16:51:15,743 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 16:51:15,747 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 16:51:15,747 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 16:51:15,749 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-30 16:51:15,749 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-08-30 16:51:15,749 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:51:15,749 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:51:15,765 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 16:51:15,766 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 16:51:15,766 INFO L158 Benchmark]: Toolchain (without parser) took 8382.91ms. Allocated memory was 60.8MB in the beginning and 117.4MB in the end (delta: 56.6MB). Free memory was 45.7MB in the beginning and 50.9MB in the end (delta: -5.2MB). Peak memory consumption was 49.8MB. Max. memory is 16.1GB. [2021-08-30 16:51:15,766 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 46.1MB. Free memory was 28.3MB in the beginning and 28.3MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:51:15,767 INFO L158 Benchmark]: CACSL2BoogieTranslator took 142.98ms. Allocated memory is still 60.8MB. Free memory was 45.5MB in the beginning and 36.5MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-30 16:51:15,767 INFO L158 Benchmark]: Boogie Preprocessor took 35.44ms. Allocated memory is still 60.8MB. Free memory was 36.5MB in the beginning and 35.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:51:15,767 INFO L158 Benchmark]: RCFGBuilder took 215.33ms. Allocated memory is still 60.8MB. Free memory was 35.1MB in the beginning and 41.5MB in the end (delta: -6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-30 16:51:15,767 INFO L158 Benchmark]: TraceAbstraction took 7957.28ms. Allocated memory was 60.8MB in the beginning and 117.4MB in the end (delta: 56.6MB). Free memory was 41.1MB in the beginning and 53.7MB in the end (delta: -12.7MB). Peak memory consumption was 44.2MB. Max. memory is 16.1GB. [2021-08-30 16:51:15,768 INFO L158 Benchmark]: Witness Printer took 24.95ms. Allocated memory is still 117.4MB. Free memory was 53.7MB in the beginning and 50.9MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:51:15,768 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 46.1MB. Free memory was 28.3MB in the beginning and 28.3MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 142.98ms. Allocated memory is still 60.8MB. Free memory was 45.5MB in the beginning and 36.5MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.44ms. Allocated memory is still 60.8MB. Free memory was 36.5MB in the beginning and 35.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 215.33ms. Allocated memory is still 60.8MB. Free memory was 35.1MB in the beginning and 41.5MB in the end (delta: -6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 7957.28ms. Allocated memory was 60.8MB in the beginning and 117.4MB in the end (delta: 56.6MB). Free memory was 41.1MB in the beginning and 53.7MB in the end (delta: -12.7MB). Peak memory consumption was 44.2MB. Max. memory is 16.1GB. * Witness Printer took 24.95ms. Allocated memory is still 117.4MB. Free memory was 53.7MB in the beginning and 50.9MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 22]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 7917.01ms, OverallIterations: 10, TraceHistogramMax: 46, EmptinessCheckTime: 21.25ms, AutomataDifference: 981.05ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 8.84ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 402 SdHoareTripleChecker+Valid, 744.34ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 402 mSDsluCounter, 105 SdHoareTripleChecker+Invalid, 598.88ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2 IncrementalHoareTripleChecker+Unchecked, 475 mSDsCounter, 88 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1263 IncrementalHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 88 mSolverCounterUnsat, 31 mSDtfsCounter, 1263 mSolverCounterSat, 13.53ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 796 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1985.23ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred in iteration=9, InterpolantAutomatonStates: 125, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 91.84ms AutomataMinimizationTime, 10 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 81.96ms SsaConstructionTime, 347.63ms SatisfiabilityAnalysisTime, 4686.08ms InterpolantComputationTime, 982 NumberOfCodeBlocks, 762 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1164 ConstructedInterpolants, 1 QuantifiedInterpolants, 5795 SizeOfPredicates, 1 NumberOfNonLiveVariables, 749 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 4456/12330 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-30 16:51:15,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...