./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 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/AutomizerReach.xml -i ../sv-benchmarks/c/locks/test_locks_6.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a6bc1adbcafb13db44c5d4b4826990150e2f336 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-04 18:07:02,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-04 18:07:02,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-04 18:07:02,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-04 18:07:02,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-04 18:07:02,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-04 18:07:02,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-04 18:07:02,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-04 18:07:02,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-04 18:07:02,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-04 18:07:02,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-04 18:07:02,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-04 18:07:02,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-04 18:07:02,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-04 18:07:02,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-04 18:07:02,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-04 18:07:02,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-04 18:07:02,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-04 18:07:02,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-04 18:07:02,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-04 18:07:02,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-04 18:07:02,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-04 18:07:02,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-04 18:07:02,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-04 18:07:02,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-04 18:07:02,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-04 18:07:02,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-04 18:07:02,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-04 18:07:02,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-04 18:07:02,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-04 18:07:02,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-04 18:07:02,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-04 18:07:02,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-04 18:07:02,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-04 18:07:02,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-04 18:07:02,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-04 18:07:02,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-04 18:07:02,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-04 18:07:02,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-04 18:07:02,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-04 18:07:02,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-04 18:07:02,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-04 18:07:02,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-04 18:07:02,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-04 18:07:02,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-04 18:07:02,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-04 18:07:02,797 INFO L138 SettingsManager]: * Use SBE=true [2021-07-04 18:07:02,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-04 18:07:02,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-04 18:07:02,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-04 18:07:02,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-04 18:07:02,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-04 18:07:02,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-04 18:07:02,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-04 18:07:02,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-04 18:07:02,798 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-04 18:07:02,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-04 18:07:02,798 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-04 18:07:02,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-04 18:07:02,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-04 18:07:02,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-04 18:07:02,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-04 18:07:02,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 18:07:02,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-04 18:07:02,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-04 18:07:02,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-04 18:07:02,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-04 18:07:02,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-04 18:07:02,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-04 18:07:02,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-04 18:07:02,799 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a6bc1adbcafb13db44c5d4b4826990150e2f336 [2021-07-04 18:07:03,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-04 18:07:03,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-04 18:07:03,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-04 18:07:03,087 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-04 18:07:03,087 INFO L275 PluginConnector]: CDTParser initialized [2021-07-04 18:07:03,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_6.c [2021-07-04 18:07:03,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09e6ad6db/f8de8a1e448b4f8bbf30bf35fd05a0e9/FLAG86440f98e [2021-07-04 18:07:03,463 INFO L306 CDTParser]: Found 1 translation units. [2021-07-04 18:07:03,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_6.c [2021-07-04 18:07:03,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09e6ad6db/f8de8a1e448b4f8bbf30bf35fd05a0e9/FLAG86440f98e [2021-07-04 18:07:03,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09e6ad6db/f8de8a1e448b4f8bbf30bf35fd05a0e9 [2021-07-04 18:07:03,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-04 18:07:03,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-04 18:07:03,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-04 18:07:03,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-04 18:07:03,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-04 18:07:03,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 06:07:03" (1/1) ... [2021-07-04 18:07:03,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@480a11c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:03, skipping insertion in model container [2021-07-04 18:07:03,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 06:07:03" (1/1) ... [2021-07-04 18:07:03,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-04 18:07:03,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-04 18:07:03,998 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_6.c[2544,2557] [2021-07-04 18:07:04,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 18:07:04,005 INFO L203 MainTranslator]: Completed pre-run [2021-07-04 18:07:04,058 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_6.c[2544,2557] [2021-07-04 18:07:04,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 18:07:04,069 INFO L208 MainTranslator]: Completed translation [2021-07-04 18:07:04,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04 WrapperNode [2021-07-04 18:07:04,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-04 18:07:04,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-04 18:07:04,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-04 18:07:04,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-04 18:07:04,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04" (1/1) ... [2021-07-04 18:07:04,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04" (1/1) ... [2021-07-04 18:07:04,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-04 18:07:04,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-04 18:07:04,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-04 18:07:04,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-04 18:07:04,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04" (1/1) ... [2021-07-04 18:07:04,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04" (1/1) ... [2021-07-04 18:07:04,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04" (1/1) ... [2021-07-04 18:07:04,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04" (1/1) ... [2021-07-04 18:07:04,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04" (1/1) ... [2021-07-04 18:07:04,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04" (1/1) ... [2021-07-04 18:07:04,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04" (1/1) ... [2021-07-04 18:07:04,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-04 18:07:04,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-04 18:07:04,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-04 18:07:04,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-04 18:07:04,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04" (1/1) ... [2021-07-04 18:07:04,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 18:07:04,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-04 18:07:04,146 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) [2021-07-04 18:07:04,165 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 [2021-07-04 18:07:04,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-04 18:07:04,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-04 18:07:04,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-04 18:07:04,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-04 18:07:04,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-04 18:07:04,434 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-07-04 18:07:04,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 06:07:04 BoogieIcfgContainer [2021-07-04 18:07:04,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-04 18:07:04,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-04 18:07:04,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-04 18:07:04,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-04 18:07:04,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.07 06:07:03" (1/3) ... [2021-07-04 18:07:04,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc1230a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 06:07:04, skipping insertion in model container [2021-07-04 18:07:04,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:07:04" (2/3) ... [2021-07-04 18:07:04,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc1230a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 06:07:04, skipping insertion in model container [2021-07-04 18:07:04,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 06:07:04" (3/3) ... [2021-07-04 18:07:04,458 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2021-07-04 18:07:04,462 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-04 18:07:04,462 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-04 18:07:04,503 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-04 18:07:04,510 INFO L329 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-04 18:07:04,510 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-04 18:07:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-04 18:07:04,526 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:04,526 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:04,526 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash -721193823, now seen corresponding path program 1 times [2021-07-04 18:07:04,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:04,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866043472] [2021-07-04 18:07:04,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:04,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:04,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:04,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:04,681 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:04,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:04,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:04,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:04,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:04,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866043472] [2021-07-04 18:07:04,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866043472] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:04,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:04,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:04,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982770540] [2021-07-04 18:07:04,704 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:04,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:04,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:04,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:04,715 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-07-04 18:07:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:04,756 INFO L93 Difference]: Finished difference Result 59 states and 97 transitions. [2021-07-04 18:07:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:04,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-04 18:07:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:04,763 INFO L225 Difference]: With dead ends: 59 [2021-07-04 18:07:04,764 INFO L226 Difference]: Without dead ends: 45 [2021-07-04 18:07:04,765 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-04 18:07:04,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-07-04 18:07:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 54 transitions. [2021-07-04 18:07:04,789 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 54 transitions. Word has length 13 [2021-07-04 18:07:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:04,790 INFO L442 AbstractCegarLoop]: Abstraction has 31 states and 54 transitions. [2021-07-04 18:07:04,790 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-07-04 18:07:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 54 transitions. [2021-07-04 18:07:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-04 18:07:04,792 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:04,792 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:04,792 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-04 18:07:04,793 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:04,795 INFO L82 PathProgramCache]: Analyzing trace with hash -41135453, now seen corresponding path program 1 times [2021-07-04 18:07:04,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:04,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447256342] [2021-07-04 18:07:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:04,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:04,852 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:04,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:04,853 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:04,853 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:04,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:04,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:04,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:04,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447256342] [2021-07-04 18:07:04,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447256342] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:04,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:04,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:04,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713040273] [2021-07-04 18:07:04,864 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:04,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:04,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:04,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:04,866 INFO L87 Difference]: Start difference. First operand 31 states and 54 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-07-04 18:07:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:04,886 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2021-07-04 18:07:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:04,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-04 18:07:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:04,888 INFO L225 Difference]: With dead ends: 74 [2021-07-04 18:07:04,888 INFO L226 Difference]: Without dead ends: 45 [2021-07-04 18:07:04,889 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-04 18:07:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-07-04 18:07:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 42 states have internal predecessors, (74), 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) [2021-07-04 18:07:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 74 transitions. [2021-07-04 18:07:04,899 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 74 transitions. Word has length 13 [2021-07-04 18:07:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:04,900 INFO L442 AbstractCegarLoop]: Abstraction has 43 states and 74 transitions. [2021-07-04 18:07:04,900 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-07-04 18:07:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 74 transitions. [2021-07-04 18:07:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-04 18:07:04,900 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:04,901 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:04,901 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-04 18:07:04,901 INFO L374 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:04,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:04,907 INFO L82 PathProgramCache]: Analyzing trace with hash -881957389, now seen corresponding path program 1 times [2021-07-04 18:07:04,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:04,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310779624] [2021-07-04 18:07:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:04,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:04,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:04,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:04,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:04,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:07:04,949 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:04,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:04,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:04,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310779624] [2021-07-04 18:07:04,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310779624] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:04,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:04,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:04,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865804302] [2021-07-04 18:07:04,951 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:04,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:04,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:04,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:04,955 INFO L87 Difference]: Start difference. First operand 43 states and 74 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:04,970 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2021-07-04 18:07:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:04,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-04 18:07:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:04,971 INFO L225 Difference]: With dead ends: 69 [2021-07-04 18:07:04,972 INFO L226 Difference]: Without dead ends: 48 [2021-07-04 18:07:04,972 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-07-04 18:07:04,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-07-04 18:07:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 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) [2021-07-04 18:07:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 76 transitions. [2021-07-04 18:07:04,980 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 76 transitions. Word has length 14 [2021-07-04 18:07:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:04,981 INFO L442 AbstractCegarLoop]: Abstraction has 46 states and 76 transitions. [2021-07-04 18:07:04,981 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 76 transitions. [2021-07-04 18:07:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-04 18:07:04,981 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:04,982 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:04,982 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-04 18:07:04,982 INFO L374 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:04,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1274984399, now seen corresponding path program 1 times [2021-07-04 18:07:04,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:04,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386990385] [2021-07-04 18:07:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:04,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,015 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,015 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:05,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386990385] [2021-07-04 18:07:05,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386990385] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302135320] [2021-07-04 18:07:05,021 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,022 INFO L87 Difference]: Start difference. First operand 46 states and 76 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,040 INFO L93 Difference]: Finished difference Result 85 states and 141 transitions. [2021-07-04 18:07:05,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-04 18:07:05,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,044 INFO L225 Difference]: With dead ends: 85 [2021-07-04 18:07:05,044 INFO L226 Difference]: Without dead ends: 83 [2021-07-04 18:07:05,045 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-04 18:07:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2021-07-04 18:07:05,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 60 states have internal predecessors, (101), 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) [2021-07-04 18:07:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 101 transitions. [2021-07-04 18:07:05,057 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 101 transitions. Word has length 14 [2021-07-04 18:07:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,057 INFO L442 AbstractCegarLoop]: Abstraction has 61 states and 101 transitions. [2021-07-04 18:07:05,057 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 101 transitions. [2021-07-04 18:07:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-04 18:07:05,058 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,058 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,058 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-04 18:07:05,059 INFO L374 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,059 INFO L82 PathProgramCache]: Analyzing trace with hash -594926029, now seen corresponding path program 1 times [2021-07-04 18:07:05,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191399870] [2021-07-04 18:07:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:05,095 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191399870] [2021-07-04 18:07:05,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191399870] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386227929] [2021-07-04 18:07:05,097 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,098 INFO L87 Difference]: Start difference. First operand 61 states and 101 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,114 INFO L93 Difference]: Finished difference Result 141 states and 235 transitions. [2021-07-04 18:07:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-04 18:07:05,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,121 INFO L225 Difference]: With dead ends: 141 [2021-07-04 18:07:05,122 INFO L226 Difference]: Without dead ends: 85 [2021-07-04 18:07:05,122 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-04 18:07:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-07-04 18:07:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.646341463414634) internal successors, (135), 82 states have internal predecessors, (135), 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) [2021-07-04 18:07:05,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 135 transitions. [2021-07-04 18:07:05,134 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 135 transitions. Word has length 14 [2021-07-04 18:07:05,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,134 INFO L442 AbstractCegarLoop]: Abstraction has 83 states and 135 transitions. [2021-07-04 18:07:05,134 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,135 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 135 transitions. [2021-07-04 18:07:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-04 18:07:05,136 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,137 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,137 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-04 18:07:05,137 INFO L374 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,139 INFO L82 PathProgramCache]: Analyzing trace with hash -869595720, now seen corresponding path program 1 times [2021-07-04 18:07:05,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75517074] [2021-07-04 18:07:05,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,164 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,165 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:07:05,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75517074] [2021-07-04 18:07:05,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75517074] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171771525] [2021-07-04 18:07:05,171 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,171 INFO L87 Difference]: Start difference. First operand 83 states and 135 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,181 INFO L93 Difference]: Finished difference Result 126 states and 202 transitions. [2021-07-04 18:07:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-04 18:07:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,182 INFO L225 Difference]: With dead ends: 126 [2021-07-04 18:07:05,182 INFO L226 Difference]: Without dead ends: 87 [2021-07-04 18:07:05,183 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-04 18:07:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-07-04 18:07:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.6071428571428572) internal successors, (135), 84 states have internal predecessors, (135), 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) [2021-07-04 18:07:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 135 transitions. [2021-07-04 18:07:05,191 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 135 transitions. Word has length 15 [2021-07-04 18:07:05,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,191 INFO L442 AbstractCegarLoop]: Abstraction has 85 states and 135 transitions. [2021-07-04 18:07:05,191 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 135 transitions. [2021-07-04 18:07:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-04 18:07:05,194 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,195 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,195 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-04 18:07:05,195 INFO L374 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1262622730, now seen corresponding path program 1 times [2021-07-04 18:07:05,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814199524] [2021-07-04 18:07:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,224 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,224 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,224 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:05,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814199524] [2021-07-04 18:07:05,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814199524] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010754705] [2021-07-04 18:07:05,229 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,230 INFO L87 Difference]: Start difference. First operand 85 states and 135 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,248 INFO L93 Difference]: Finished difference Result 237 states and 377 transitions. [2021-07-04 18:07:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-04 18:07:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,249 INFO L225 Difference]: With dead ends: 237 [2021-07-04 18:07:05,249 INFO L226 Difference]: Without dead ends: 159 [2021-07-04 18:07:05,250 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-04 18:07:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2021-07-04 18:07:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.5576923076923077) internal successors, (243), 156 states have internal predecessors, (243), 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) [2021-07-04 18:07:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 243 transitions. [2021-07-04 18:07:05,258 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 243 transitions. Word has length 15 [2021-07-04 18:07:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,259 INFO L442 AbstractCegarLoop]: Abstraction has 157 states and 243 transitions. [2021-07-04 18:07:05,259 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 243 transitions. [2021-07-04 18:07:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-04 18:07:05,260 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,260 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,260 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-04 18:07:05,261 INFO L374 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1942681100, now seen corresponding path program 1 times [2021-07-04 18:07:05,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859327288] [2021-07-04 18:07:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,285 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:05,288 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859327288] [2021-07-04 18:07:05,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859327288] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395933425] [2021-07-04 18:07:05,290 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,291 INFO L87 Difference]: Start difference. First operand 157 states and 243 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,309 INFO L93 Difference]: Finished difference Result 193 states and 301 transitions. [2021-07-04 18:07:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-04 18:07:05,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,311 INFO L225 Difference]: With dead ends: 193 [2021-07-04 18:07:05,311 INFO L226 Difference]: Without dead ends: 191 [2021-07-04 18:07:05,311 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-04 18:07:05,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 157. [2021-07-04 18:07:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.5320512820512822) internal successors, (239), 156 states have internal predecessors, (239), 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) [2021-07-04 18:07:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 239 transitions. [2021-07-04 18:07:05,322 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 239 transitions. Word has length 15 [2021-07-04 18:07:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,327 INFO L442 AbstractCegarLoop]: Abstraction has 157 states and 239 transitions. [2021-07-04 18:07:05,327 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 239 transitions. [2021-07-04 18:07:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-04 18:07:05,328 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,328 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,329 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-04 18:07:05,329 INFO L374 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash -486383640, now seen corresponding path program 1 times [2021-07-04 18:07:05,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695792368] [2021-07-04 18:07:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,356 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,356 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:05,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695792368] [2021-07-04 18:07:05,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695792368] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667548335] [2021-07-04 18:07:05,362 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,363 INFO L87 Difference]: Start difference. First operand 157 states and 239 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-07-04 18:07:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,379 INFO L93 Difference]: Finished difference Result 277 states and 425 transitions. [2021-07-04 18:07:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-04 18:07:05,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,380 INFO L225 Difference]: With dead ends: 277 [2021-07-04 18:07:05,381 INFO L226 Difference]: Without dead ends: 275 [2021-07-04 18:07:05,381 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-07-04 18:07:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 225. [2021-07-04 18:07:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.4955357142857142) internal successors, (335), 224 states have internal predecessors, (335), 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) [2021-07-04 18:07:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 335 transitions. [2021-07-04 18:07:05,391 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 335 transitions. Word has length 16 [2021-07-04 18:07:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,392 INFO L442 AbstractCegarLoop]: Abstraction has 225 states and 335 transitions. [2021-07-04 18:07:05,392 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-07-04 18:07:05,392 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 335 transitions. [2021-07-04 18:07:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-04 18:07:05,393 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,393 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,393 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-04 18:07:05,393 INFO L374 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,394 INFO L82 PathProgramCache]: Analyzing trace with hash 193674730, now seen corresponding path program 1 times [2021-07-04 18:07:05,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222461783] [2021-07-04 18:07:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,410 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,410 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,411 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,411 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:05,414 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,414 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222461783] [2021-07-04 18:07:05,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222461783] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602569013] [2021-07-04 18:07:05,416 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,417 INFO L87 Difference]: Start difference. First operand 225 states and 335 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-07-04 18:07:05,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,432 INFO L93 Difference]: Finished difference Result 517 states and 769 transitions. [2021-07-04 18:07:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-04 18:07:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,434 INFO L225 Difference]: With dead ends: 517 [2021-07-04 18:07:05,434 INFO L226 Difference]: Without dead ends: 299 [2021-07-04 18:07:05,435 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-07-04 18:07:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2021-07-04 18:07:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.4425675675675675) internal successors, (427), 296 states have internal predecessors, (427), 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) [2021-07-04 18:07:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 427 transitions. [2021-07-04 18:07:05,446 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 427 transitions. Word has length 16 [2021-07-04 18:07:05,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,446 INFO L442 AbstractCegarLoop]: Abstraction has 297 states and 427 transitions. [2021-07-04 18:07:05,446 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-07-04 18:07:05,446 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 427 transitions. [2021-07-04 18:07:05,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-04 18:07:05,447 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,447 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,447 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-04 18:07:05,448 INFO L374 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2102192011, now seen corresponding path program 1 times [2021-07-04 18:07:05,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57669079] [2021-07-04 18:07:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,463 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,464 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:07:05,467 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,468 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57669079] [2021-07-04 18:07:05,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57669079] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471297719] [2021-07-04 18:07:05,470 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,471 INFO L87 Difference]: Start difference. First operand 297 states and 427 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,484 INFO L93 Difference]: Finished difference Result 453 states and 649 transitions. [2021-07-04 18:07:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-04 18:07:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,486 INFO L225 Difference]: With dead ends: 453 [2021-07-04 18:07:05,486 INFO L226 Difference]: Without dead ends: 311 [2021-07-04 18:07:05,487 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-04 18:07:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2021-07-04 18:07:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.4123376623376624) internal successors, (435), 308 states have internal predecessors, (435), 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) [2021-07-04 18:07:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 435 transitions. [2021-07-04 18:07:05,496 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 435 transitions. Word has length 17 [2021-07-04 18:07:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,497 INFO L442 AbstractCegarLoop]: Abstraction has 309 states and 435 transitions. [2021-07-04 18:07:05,497 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 435 transitions. [2021-07-04 18:07:05,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-04 18:07:05,498 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,498 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,498 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-04 18:07:05,498 INFO L374 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1709165001, now seen corresponding path program 1 times [2021-07-04 18:07:05,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347497256] [2021-07-04 18:07:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,518 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,518 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,519 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,519 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:05,522 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,522 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347497256] [2021-07-04 18:07:05,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347497256] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648792701] [2021-07-04 18:07:05,524 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,525 INFO L87 Difference]: Start difference. First operand 309 states and 435 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,538 INFO L93 Difference]: Finished difference Result 521 states and 733 transitions. [2021-07-04 18:07:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-04 18:07:05,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,541 INFO L225 Difference]: With dead ends: 521 [2021-07-04 18:07:05,541 INFO L226 Difference]: Without dead ends: 519 [2021-07-04 18:07:05,542 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-04 18:07:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 453. [2021-07-04 18:07:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.3694690265486726) internal successors, (619), 452 states have internal predecessors, (619), 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) [2021-07-04 18:07:05,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 619 transitions. [2021-07-04 18:07:05,550 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 619 transitions. Word has length 17 [2021-07-04 18:07:05,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,551 INFO L442 AbstractCegarLoop]: Abstraction has 453 states and 619 transitions. [2021-07-04 18:07:05,551 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 619 transitions. [2021-07-04 18:07:05,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-04 18:07:05,552 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,552 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,552 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-04 18:07:05,552 INFO L374 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1905743925, now seen corresponding path program 1 times [2021-07-04 18:07:05,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078467865] [2021-07-04 18:07:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,563 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:05,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,566 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078467865] [2021-07-04 18:07:05,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078467865] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517189207] [2021-07-04 18:07:05,567 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,568 INFO L87 Difference]: Start difference. First operand 453 states and 619 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,580 INFO L93 Difference]: Finished difference Result 1017 states and 1373 transitions. [2021-07-04 18:07:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-04 18:07:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,582 INFO L225 Difference]: With dead ends: 1017 [2021-07-04 18:07:05,582 INFO L226 Difference]: Without dead ends: 583 [2021-07-04 18:07:05,583 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-07-04 18:07:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 581. [2021-07-04 18:07:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.3017241379310345) internal successors, (755), 580 states have internal predecessors, (755), 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) [2021-07-04 18:07:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 755 transitions. [2021-07-04 18:07:05,593 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 755 transitions. Word has length 17 [2021-07-04 18:07:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,594 INFO L442 AbstractCegarLoop]: Abstraction has 581 states and 755 transitions. [2021-07-04 18:07:05,594 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 755 transitions. [2021-07-04 18:07:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-04 18:07:05,595 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,595 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,595 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-04 18:07:05,595 INFO L374 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1444723487, now seen corresponding path program 1 times [2021-07-04 18:07:05,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737893090] [2021-07-04 18:07:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,604 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,605 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:07:05,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737893090] [2021-07-04 18:07:05,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737893090] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793570135] [2021-07-04 18:07:05,609 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,609 INFO L87 Difference]: Start difference. First operand 581 states and 755 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,620 INFO L93 Difference]: Finished difference Result 873 states and 1125 transitions. [2021-07-04 18:07:05,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-04 18:07:05,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,622 INFO L225 Difference]: With dead ends: 873 [2021-07-04 18:07:05,622 INFO L226 Difference]: Without dead ends: 599 [2021-07-04 18:07:05,623 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-07-04 18:07:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2021-07-04 18:07:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 1.266778523489933) internal successors, (755), 596 states have internal predecessors, (755), 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) [2021-07-04 18:07:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 755 transitions. [2021-07-04 18:07:05,638 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 755 transitions. Word has length 18 [2021-07-04 18:07:05,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,638 INFO L442 AbstractCegarLoop]: Abstraction has 597 states and 755 transitions. [2021-07-04 18:07:05,638 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 755 transitions. [2021-07-04 18:07:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-04 18:07:05,639 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,639 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,639 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-04 18:07:05,640 INFO L374 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1051696477, now seen corresponding path program 1 times [2021-07-04 18:07:05,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838004120] [2021-07-04 18:07:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,648 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:05,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838004120] [2021-07-04 18:07:05,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838004120] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115629312] [2021-07-04 18:07:05,653 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,654 INFO L87 Difference]: Start difference. First operand 597 states and 755 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,667 INFO L93 Difference]: Finished difference Result 967 states and 1204 transitions. [2021-07-04 18:07:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-04 18:07:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,670 INFO L225 Difference]: With dead ends: 967 [2021-07-04 18:07:05,670 INFO L226 Difference]: Without dead ends: 965 [2021-07-04 18:07:05,670 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-07-04 18:07:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 901. [2021-07-04 18:07:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 1.23) internal successors, (1107), 900 states have internal predecessors, (1107), 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) [2021-07-04 18:07:05,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1107 transitions. [2021-07-04 18:07:05,684 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1107 transitions. Word has length 18 [2021-07-04 18:07:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,685 INFO L442 AbstractCegarLoop]: Abstraction has 901 states and 1107 transitions. [2021-07-04 18:07:05,685 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1107 transitions. [2021-07-04 18:07:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-04 18:07:05,686 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:07:05,686 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:07:05,686 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-04 18:07:05,686 INFO L374 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:07:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:07:05,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1731754847, now seen corresponding path program 1 times [2021-07-04 18:07:05,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:07:05,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387404205] [2021-07-04 18:07:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:07:05,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:07:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:07:05,695 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,695 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,696 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,696 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:07:05,698 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:07:05,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:07:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:07:05,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:07:05,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387404205] [2021-07-04 18:07:05,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387404205] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:07:05,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:07:05,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:07:05,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471901721] [2021-07-04 18:07:05,700 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:07:05,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:07:05,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:07:05,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,701 INFO L87 Difference]: Start difference. First operand 901 states and 1107 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:07:05,727 INFO L93 Difference]: Finished difference Result 1989 states and 2387 transitions. [2021-07-04 18:07:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:07:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-04 18:07:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:07:05,728 INFO L225 Difference]: With dead ends: 1989 [2021-07-04 18:07:05,728 INFO L226 Difference]: Without dead ends: 0 [2021-07-04 18:07:05,729 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:07:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-04 18:07:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-04 18:07:05,729 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) [2021-07-04 18:07:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-04 18:07:05,730 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-07-04 18:07:05,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:07:05,730 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-04 18:07:05,730 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:07:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-04 18:07:05,730 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-04 18:07:05,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-07-04 18:07:05,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 18:07:05,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 18:07:05,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 18:07:05,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-04 18:07:05,745 INFO L762 garLoopResultBuilder]: For program point L60-1(lines 29 104) no Hoare annotation was computed. [2021-07-04 18:07:05,746 INFO L762 garLoopResultBuilder]: For program point L85(line 85) no Hoare annotation was computed. [2021-07-04 18:07:05,746 INFO L762 garLoopResultBuilder]: For program point L52-1(lines 29 104) no Hoare annotation was computed. [2021-07-04 18:07:05,746 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-07-04 18:07:05,746 INFO L762 garLoopResultBuilder]: For program point L94-1(lines 29 104) no Hoare annotation was computed. [2021-07-04 18:07:05,746 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-07-04 18:07:05,746 INFO L762 garLoopResultBuilder]: For program point L95(line 95) no Hoare annotation was computed. [2021-07-04 18:07:05,746 INFO L762 garLoopResultBuilder]: For program point L79-1(lines 29 104) no Hoare annotation was computed. [2021-07-04 18:07:05,746 INFO L762 garLoopResultBuilder]: For program point L80(line 80) no Hoare annotation was computed. [2021-07-04 18:07:05,747 INFO L765 garLoopResultBuilder]: At program point L105(lines 7 109) the Hoare annotation is: true [2021-07-04 18:07:05,747 INFO L762 garLoopResultBuilder]: For program point L31(lines 31 33) no Hoare annotation was computed. [2021-07-04 18:07:05,748 INFO L762 garLoopResultBuilder]: For program point L64-1(lines 29 104) no Hoare annotation was computed. [2021-07-04 18:07:05,749 INFO L762 garLoopResultBuilder]: For program point L89-1(lines 29 104) no Hoare annotation was computed. [2021-07-04 18:07:05,749 INFO L762 garLoopResultBuilder]: For program point L56-1(lines 29 104) no Hoare annotation was computed. [2021-07-04 18:07:05,749 INFO L762 garLoopResultBuilder]: For program point L48(lines 48 50) no Hoare annotation was computed. [2021-07-04 18:07:05,749 INFO L762 garLoopResultBuilder]: For program point L48-2(lines 29 104) no Hoare annotation was computed. [2021-07-04 18:07:05,749 INFO L762 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-07-04 18:07:05,749 INFO L762 garLoopResultBuilder]: For program point L90(line 90) no Hoare annotation was computed. [2021-07-04 18:07:05,749 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 107) no Hoare annotation was computed. [2021-07-04 18:07:05,750 INFO L762 garLoopResultBuilder]: For program point L74-1(lines 29 104) no Hoare annotation was computed. [2021-07-04 18:07:05,750 INFO L765 garLoopResultBuilder]: At program point L99-1(lines 29 104) the Hoare annotation is: true [2021-07-04 18:07:05,750 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-07-04 18:07:05,750 INFO L765 garLoopResultBuilder]: At program point L108(lines 6 109) the Hoare annotation is: true [2021-07-04 18:07:05,750 INFO L762 garLoopResultBuilder]: For program point L75(line 75) no Hoare annotation was computed. [2021-07-04 18:07:05,750 INFO L762 garLoopResultBuilder]: For program point L100(line 100) no Hoare annotation was computed. [2021-07-04 18:07:05,751 INFO L758 garLoopResultBuilder]: At program point L100-1(lines 7 109) the Hoare annotation is: false [2021-07-04 18:07:05,751 INFO L762 garLoopResultBuilder]: For program point L84-1(lines 29 104) no Hoare annotation was computed. [2021-07-04 18:07:05,751 INFO L762 garLoopResultBuilder]: For program point L68-1(lines 29 104) no Hoare annotation was computed. [2021-07-04 18:07:05,751 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-04 18:07:05,752 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-04 18:07:05,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.07 06:07:05 BoogieIcfgContainer [2021-07-04 18:07:05,762 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-04 18:07:05,763 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-04 18:07:05,763 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-04 18:07:05,763 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-04 18:07:05,763 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 06:07:04" (3/4) ... [2021-07-04 18:07:05,766 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-07-04 18:07:05,773 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-07-04 18:07:05,774 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-07-04 18:07:05,774 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-04 18:07:05,774 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-07-04 18:07:05,804 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-04 18:07:05,805 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-04 18:07:05,806 INFO L168 Benchmark]: Toolchain (without parser) took 1914.49 ms. Allocated memory was 52.4 MB in the beginning and 88.1 MB in the end (delta: 35.7 MB). Free memory was 29.7 MB in the beginning and 58.7 MB in the end (delta: -29.0 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-07-04 18:07:05,807 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 52.4 MB. Free memory was 33.1 MB in the beginning and 33.0 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 18:07:05,808 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.90 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 29.4 MB in the beginning and 56.8 MB in the end (delta: -27.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2021-07-04 18:07:05,808 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.76 ms. Allocated memory is still 73.4 MB. Free memory was 56.8 MB in the beginning and 55.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 18:07:05,808 INFO L168 Benchmark]: Boogie Preprocessor took 24.61 ms. Allocated memory is still 73.4 MB. Free memory was 55.3 MB in the beginning and 54.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 18:07:05,809 INFO L168 Benchmark]: RCFGBuilder took 314.36 ms. Allocated memory is still 73.4 MB. Free memory was 54.1 MB in the beginning and 54.7 MB in the end (delta: -673.7 kB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2021-07-04 18:07:05,812 INFO L168 Benchmark]: TraceAbstraction took 1326.15 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 54.3 MB in the beginning and 62.3 MB in the end (delta: -8.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2021-07-04 18:07:05,812 INFO L168 Benchmark]: Witness Printer took 42.06 ms. Allocated memory is still 88.1 MB. Free memory was 62.3 MB in the beginning and 58.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-04 18:07:05,814 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 52.4 MB. Free memory was 33.1 MB in the beginning and 33.0 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 178.90 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 29.4 MB in the beginning and 56.8 MB in the end (delta: -27.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.76 ms. Allocated memory is still 73.4 MB. Free memory was 56.8 MB in the beginning and 55.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.61 ms. Allocated memory is still 73.4 MB. Free memory was 55.3 MB in the beginning and 54.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 314.36 ms. Allocated memory is still 73.4 MB. Free memory was 54.1 MB in the beginning and 54.7 MB in the end (delta: -673.7 kB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1326.15 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 54.3 MB in the beginning and 62.3 MB in the end (delta: -8.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * Witness Printer took 42.06 ms. Allocated memory is still 88.1 MB. Free memory was 62.3 MB in the beginning and 58.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 107]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1254.4ms, OverallIterations: 16, TraceHistogramMax: 1, EmptinessCheckTime: 19.9ms, AutomataDifference: 354.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 12.1ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 828 SDtfs, 391 SDslu, 527 SDs, 0 SdLazy, 85 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 95.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=901occurred in iteration=15, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 161.4ms AutomataMinimizationTime, 16 MinimizatonAttempts, 268 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 73 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 4.1ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 3.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 30.5ms SsaConstructionTime, 150.7ms SatisfiabilityAnalysisTime, 305.8ms InterpolantComputationTime, 250 NumberOfCodeBlocks, 250 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 462 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 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 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-07-04 18:07:05,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...