./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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/pthread/triangular-longer-2.i -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 a5fa90664ca55dc032190ae3401b73f390ff1e9b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 02:45:03,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 02:45:03,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 02:45:03,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 02:45:03,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 02:45:03,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 02:45:03,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 02:45:03,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 02:45:03,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 02:45:03,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 02:45:03,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 02:45:03,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 02:45:03,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 02:45:03,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 02:45:03,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 02:45:03,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 02:45:03,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 02:45:03,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 02:45:03,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 02:45:03,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 02:45:03,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 02:45:03,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 02:45:03,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 02:45:03,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 02:45:03,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 02:45:03,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 02:45:03,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 02:45:03,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 02:45:03,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 02:45:03,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 02:45:03,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 02:45:03,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 02:45:03,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 02:45:03,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 02:45:03,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 02:45:03,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 02:45:03,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 02:45:03,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 02:45:03,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 02:45:03,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 02:45:03,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 02:45:03,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 02:45:03,428 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 02:45:03,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 02:45:03,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 02:45:03,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 02:45:03,432 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 02:45:03,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 02:45:03,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 02:45:03,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 02:45:03,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 02:45:03,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 02:45:03,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 02:45:03,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 02:45:03,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 02:45:03,435 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 02:45:03,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 02:45:03,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 02:45:03,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 02:45:03,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 02:45:03,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 02:45:03,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 02:45:03,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 02:45:03,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 02:45:03,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 02:45:03,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 02:45:03,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 02:45:03,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 02:45:03,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 02:45:03,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 02:45:03,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 02:45:03,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> a5fa90664ca55dc032190ae3401b73f390ff1e9b [2020-10-20 02:45:03,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 02:45:03,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 02:45:03,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 02:45:03,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 02:45:03,674 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 02:45:03,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-2.i [2020-10-20 02:45:03,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e609de01c/a54c92daf2024b51946d3ed57ffed1a8/FLAG8c4ebab5f [2020-10-20 02:45:04,387 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 02:45:04,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-2.i [2020-10-20 02:45:04,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e609de01c/a54c92daf2024b51946d3ed57ffed1a8/FLAG8c4ebab5f [2020-10-20 02:45:04,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e609de01c/a54c92daf2024b51946d3ed57ffed1a8 [2020-10-20 02:45:04,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 02:45:04,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 02:45:04,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 02:45:04,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 02:45:04,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 02:45:04,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:45:04" (1/1) ... [2020-10-20 02:45:04,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c07a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:04, skipping insertion in model container [2020-10-20 02:45:04,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:45:04" (1/1) ... [2020-10-20 02:45:04,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 02:45:04,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 02:45:05,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 02:45:05,180 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 02:45:05,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 02:45:05,326 INFO L208 MainTranslator]: Completed translation [2020-10-20 02:45:05,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05 WrapperNode [2020-10-20 02:45:05,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 02:45:05,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 02:45:05,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 02:45:05,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 02:45:05,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05" (1/1) ... [2020-10-20 02:45:05,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05" (1/1) ... [2020-10-20 02:45:05,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 02:45:05,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 02:45:05,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 02:45:05,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 02:45:05,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05" (1/1) ... [2020-10-20 02:45:05,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05" (1/1) ... [2020-10-20 02:45:05,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05" (1/1) ... [2020-10-20 02:45:05,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05" (1/1) ... [2020-10-20 02:45:05,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05" (1/1) ... [2020-10-20 02:45:05,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05" (1/1) ... [2020-10-20 02:45:05,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05" (1/1) ... [2020-10-20 02:45:05,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 02:45:05,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 02:45:05,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 02:45:05,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 02:45:05,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 02:45:05,515 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-20 02:45:05,515 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-20 02:45:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-20 02:45:05,516 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-20 02:45:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 02:45:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-20 02:45:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 02:45:05,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 02:45:05,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 02:45:05,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-20 02:45:05,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 02:45:05,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 02:45:05,519 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-20 02:45:05,868 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 02:45:05,869 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 02:45:05,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:45:05 BoogieIcfgContainer [2020-10-20 02:45:05,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 02:45:05,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 02:45:05,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 02:45:05,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 02:45:05,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 02:45:04" (1/3) ... [2020-10-20 02:45:05,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fa35fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 02:45:05, skipping insertion in model container [2020-10-20 02:45:05,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:45:05" (2/3) ... [2020-10-20 02:45:05,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fa35fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 02:45:05, skipping insertion in model container [2020-10-20 02:45:05,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:45:05" (3/3) ... [2020-10-20 02:45:05,898 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-10-20 02:45:05,909 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-20 02:45:05,909 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 02:45:05,915 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 02:45:05,916 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-20 02:45:05,945 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,946 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,946 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,946 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,946 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,947 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,947 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,947 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,947 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,949 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,949 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,949 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,949 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,950 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,951 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,951 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,951 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,951 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,952 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,952 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,952 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,952 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,958 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,958 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,958 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,959 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,959 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,962 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,969 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,978 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,978 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,978 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:45:05,981 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-20 02:45:05,995 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-20 02:45:06,016 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 02:45:06,017 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 02:45:06,017 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 02:45:06,017 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 02:45:06,017 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 02:45:06,017 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 02:45:06,017 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 02:45:06,017 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 02:45:06,029 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-20 02:45:06,031 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-20 02:45:06,034 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-20 02:45:06,035 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-20 02:45:06,075 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-20 02:45:06,076 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-20 02:45:06,083 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-10-20 02:45:06,086 INFO L117 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-20 02:45:07,179 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-20 02:45:07,620 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-20 02:45:08,093 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-20 02:45:08,212 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-20 02:45:08,275 INFO L132 LiptonReduction]: Checked pairs total: 1187 [2020-10-20 02:45:08,276 INFO L134 LiptonReduction]: Total number of compositions: 62 [2020-10-20 02:45:08,283 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-20 02:45:08,302 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-20 02:45:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-20 02:45:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 02:45:08,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:08,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 02:45:08,314 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:08,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:08,320 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-20 02:45:08,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:08,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714005176] [2020-10-20 02:45:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:08,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714005176] [2020-10-20 02:45:08,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:08,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 02:45:08,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195847625] [2020-10-20 02:45:08,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 02:45:08,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:08,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 02:45:08,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 02:45:08,596 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-20 02:45:08,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:08,675 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-20 02:45:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 02:45:08,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-20 02:45:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:08,690 INFO L225 Difference]: With dead ends: 75 [2020-10-20 02:45:08,690 INFO L226 Difference]: Without dead ends: 42 [2020-10-20 02:45:08,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 02:45:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-20 02:45:08,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-20 02:45:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 02:45:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-20 02:45:08,736 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-20 02:45:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:08,737 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-20 02:45:08,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 02:45:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-20 02:45:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 02:45:08,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:08,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:08,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 02:45:08,740 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:08,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:08,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-20 02:45:08,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:08,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045448300] [2020-10-20 02:45:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:08,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045448300] [2020-10-20 02:45:08,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:08,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 02:45:08,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712161138] [2020-10-20 02:45:08,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 02:45:08,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:08,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 02:45:08,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 02:45:08,857 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-20 02:45:08,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:08,887 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-20 02:45:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 02:45:08,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-20 02:45:08,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:08,906 INFO L225 Difference]: With dead ends: 56 [2020-10-20 02:45:08,907 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 02:45:08,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:08,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 02:45:08,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-20 02:45:08,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 02:45:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-20 02:45:08,916 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-20 02:45:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:08,917 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-20 02:45:08,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 02:45:08,917 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-20 02:45:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 02:45:08,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:08,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:08,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 02:45:08,919 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:08,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:08,920 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-20 02:45:08,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:08,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889827081] [2020-10-20 02:45:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:08,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889827081] [2020-10-20 02:45:08,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:08,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 02:45:08,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377643373] [2020-10-20 02:45:08,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 02:45:08,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:08,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 02:45:08,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:08,996 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-20 02:45:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:09,074 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-10-20 02:45:09,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 02:45:09,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-20 02:45:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:09,076 INFO L225 Difference]: With dead ends: 54 [2020-10-20 02:45:09,076 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 02:45:09,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:09,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 02:45:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-20 02:45:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 02:45:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-10-20 02:45:09,084 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-10-20 02:45:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:09,084 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-10-20 02:45:09,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 02:45:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-10-20 02:45:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 02:45:09,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:09,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:09,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 02:45:09,086 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:09,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:09,086 INFO L82 PathProgramCache]: Analyzing trace with hash 2101929440, now seen corresponding path program 2 times [2020-10-20 02:45:09,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:09,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987061032] [2020-10-20 02:45:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987061032] [2020-10-20 02:45:09,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:09,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 02:45:09,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668777450] [2020-10-20 02:45:09,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 02:45:09,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:09,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 02:45:09,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:09,167 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-10-20 02:45:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:09,275 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2020-10-20 02:45:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 02:45:09,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-20 02:45:09,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:09,277 INFO L225 Difference]: With dead ends: 59 [2020-10-20 02:45:09,278 INFO L226 Difference]: Without dead ends: 53 [2020-10-20 02:45:09,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-20 02:45:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-20 02:45:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 96 transitions. [2020-10-20 02:45:09,285 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 96 transitions. Word has length 10 [2020-10-20 02:45:09,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:09,285 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 96 transitions. [2020-10-20 02:45:09,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 02:45:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 96 transitions. [2020-10-20 02:45:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 02:45:09,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:09,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:09,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 02:45:09,287 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:09,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 3 times [2020-10-20 02:45:09,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:09,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839190994] [2020-10-20 02:45:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839190994] [2020-10-20 02:45:09,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:45:09,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 02:45:09,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777238188] [2020-10-20 02:45:09,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 02:45:09,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:09,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 02:45:09,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 02:45:09,417 INFO L87 Difference]: Start difference. First operand 41 states and 96 transitions. Second operand 6 states. [2020-10-20 02:45:09,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:09,493 INFO L93 Difference]: Finished difference Result 65 states and 152 transitions. [2020-10-20 02:45:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 02:45:09,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-20 02:45:09,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:09,495 INFO L225 Difference]: With dead ends: 65 [2020-10-20 02:45:09,495 INFO L226 Difference]: Without dead ends: 52 [2020-10-20 02:45:09,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-20 02:45:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-20 02:45:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-10-20 02:45:09,502 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-10-20 02:45:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:09,503 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-10-20 02:45:09,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 02:45:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-10-20 02:45:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 02:45:09,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:09,505 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:09,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 02:45:09,505 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:09,506 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 4 times [2020-10-20 02:45:09,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:09,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068998329] [2020-10-20 02:45:09,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068998329] [2020-10-20 02:45:09,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788034431] [2020-10-20 02:45:09,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:09,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:09,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:09,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 02:45:09,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:09,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:09,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:09,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 02:45:09,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868539383] [2020-10-20 02:45:09,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 02:45:09,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:09,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 02:45:09,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-20 02:45:09,721 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-10-20 02:45:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:09,903 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-20 02:45:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 02:45:09,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-20 02:45:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:09,905 INFO L225 Difference]: With dead ends: 63 [2020-10-20 02:45:09,905 INFO L226 Difference]: Without dead ends: 54 [2020-10-20 02:45:09,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-20 02:45:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-20 02:45:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-20 02:45:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-20 02:45:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-20 02:45:09,914 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-20 02:45:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:09,914 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-20 02:45:09,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 02:45:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-20 02:45:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 02:45:09,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:09,915 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:10,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 02:45:10,125 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 5 times [2020-10-20 02:45:10,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:10,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289949188] [2020-10-20 02:45:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:10,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289949188] [2020-10-20 02:45:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038699996] [2020-10-20 02:45:10,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:10,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:10,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:10,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 02:45:10,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:10,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:10,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:10,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 02:45:10,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122575320] [2020-10-20 02:45:10,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 02:45:10,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:10,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 02:45:10,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-20 02:45:10,321 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 8 states. [2020-10-20 02:45:10,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:10,443 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-20 02:45:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 02:45:10,444 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-20 02:45:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:10,445 INFO L225 Difference]: With dead ends: 56 [2020-10-20 02:45:10,445 INFO L226 Difference]: Without dead ends: 51 [2020-10-20 02:45:10,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-20 02:45:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-20 02:45:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-20 02:45:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-20 02:45:10,451 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-20 02:45:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:10,452 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-20 02:45:10,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 02:45:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-20 02:45:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 02:45:10,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:10,454 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:10,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:10,666 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:10,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:10,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 6 times [2020-10-20 02:45:10,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:10,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213032607] [2020-10-20 02:45:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:10,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213032607] [2020-10-20 02:45:10,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427433090] [2020-10-20 02:45:10,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:10,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-20 02:45:10,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:10,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 02:45:10,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:10,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:10,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:10,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-20 02:45:10,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175797318] [2020-10-20 02:45:10,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 02:45:10,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:10,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 02:45:10,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-20 02:45:10,919 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-20 02:45:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:11,051 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-20 02:45:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 02:45:11,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-20 02:45:11,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:11,053 INFO L225 Difference]: With dead ends: 56 [2020-10-20 02:45:11,053 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 02:45:11,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 02:45:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-20 02:45:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-20 02:45:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-20 02:45:11,069 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-10-20 02:45:11,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:11,069 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-20 02:45:11,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 02:45:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-20 02:45:11,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 02:45:11,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:11,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:11,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:11,284 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 7 times [2020-10-20 02:45:11,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:11,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375473569] [2020-10-20 02:45:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:11,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375473569] [2020-10-20 02:45:11,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85297967] [2020-10-20 02:45:11,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:11,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 02:45:11,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:11,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:11,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:11,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 02:45:11,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039725274] [2020-10-20 02:45:11,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 02:45:11,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:11,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 02:45:11,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:11,450 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-10-20 02:45:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:11,644 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-10-20 02:45:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 02:45:11,646 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-20 02:45:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:11,647 INFO L225 Difference]: With dead ends: 63 [2020-10-20 02:45:11,647 INFO L226 Difference]: Without dead ends: 58 [2020-10-20 02:45:11,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-20 02:45:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-20 02:45:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-10-20 02:45:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-20 02:45:11,660 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 12 [2020-10-20 02:45:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:11,660 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-20 02:45:11,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 02:45:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-20 02:45:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 02:45:11,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:11,663 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:11,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:11,864 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 8 times [2020-10-20 02:45:11,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:11,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009425128] [2020-10-20 02:45:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:11,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009425128] [2020-10-20 02:45:11,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567730177] [2020-10-20 02:45:11,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:11,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:11,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:11,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 02:45:11,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:12,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:12,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 02:45:12,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127899948] [2020-10-20 02:45:12,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 02:45:12,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:12,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 02:45:12,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-20 02:45:12,020 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-20 02:45:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:12,205 INFO L93 Difference]: Finished difference Result 71 states and 167 transitions. [2020-10-20 02:45:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 02:45:12,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-20 02:45:12,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:12,206 INFO L225 Difference]: With dead ends: 71 [2020-10-20 02:45:12,206 INFO L226 Difference]: Without dead ends: 62 [2020-10-20 02:45:12,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-20 02:45:12,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-20 02:45:12,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2020-10-20 02:45:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-20 02:45:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-20 02:45:12,212 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-10-20 02:45:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:12,213 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-20 02:45:12,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 02:45:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-20 02:45:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 02:45:12,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:12,214 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:12,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-20 02:45:12,426 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:12,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 9 times [2020-10-20 02:45:12,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:12,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899090631] [2020-10-20 02:45:12,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:12,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899090631] [2020-10-20 02:45:12,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464685827] [2020-10-20 02:45:12,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:12,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-20 02:45:12,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:12,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 02:45:12,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:12,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:12,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:12,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 02:45:12,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755271109] [2020-10-20 02:45:12,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 02:45:12,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:12,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 02:45:12,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-20 02:45:12,598 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-20 02:45:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:12,890 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-20 02:45:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 02:45:12,890 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-20 02:45:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:12,891 INFO L225 Difference]: With dead ends: 72 [2020-10-20 02:45:12,891 INFO L226 Difference]: Without dead ends: 63 [2020-10-20 02:45:12,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-20 02:45:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-20 02:45:12,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-20 02:45:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 02:45:12,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-20 02:45:12,896 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-20 02:45:12,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:12,897 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-20 02:45:12,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 02:45:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-20 02:45:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 02:45:12,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:12,898 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:13,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:13,110 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:13,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:13,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 10 times [2020-10-20 02:45:13,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:13,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762499615] [2020-10-20 02:45:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:13,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762499615] [2020-10-20 02:45:13,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385042294] [2020-10-20 02:45:13,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:13,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:13,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:13,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 02:45:13,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:13,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:13,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:13,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 02:45:13,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968101033] [2020-10-20 02:45:13,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 02:45:13,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:13,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 02:45:13,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-20 02:45:13,300 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 10 states. [2020-10-20 02:45:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:13,479 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-20 02:45:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 02:45:13,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-20 02:45:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:13,480 INFO L225 Difference]: With dead ends: 64 [2020-10-20 02:45:13,480 INFO L226 Difference]: Without dead ends: 59 [2020-10-20 02:45:13,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-20 02:45:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-20 02:45:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-20 02:45:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-20 02:45:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-20 02:45:13,484 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-20 02:45:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:13,485 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-20 02:45:13,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 02:45:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-20 02:45:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 02:45:13,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:13,486 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:13,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:13,696 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:13,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:13,696 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 11 times [2020-10-20 02:45:13,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:13,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236263571] [2020-10-20 02:45:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:13,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236263571] [2020-10-20 02:45:13,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44700484] [2020-10-20 02:45:13,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:13,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-20 02:45:13,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:13,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 02:45:13,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:13,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:13,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:13,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-20 02:45:13,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569640811] [2020-10-20 02:45:13,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 02:45:13,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:13,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 02:45:13,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-20 02:45:13,854 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-20 02:45:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:14,013 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-20 02:45:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 02:45:14,014 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-20 02:45:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:14,016 INFO L225 Difference]: With dead ends: 64 [2020-10-20 02:45:14,016 INFO L226 Difference]: Without dead ends: 58 [2020-10-20 02:45:14,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-20 02:45:14,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-20 02:45:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-20 02:45:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-20 02:45:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-20 02:45:14,022 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-10-20 02:45:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:14,022 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-20 02:45:14,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 02:45:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-20 02:45:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 02:45:14,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:14,024 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:14,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-20 02:45:14,225 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 12 times [2020-10-20 02:45:14,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:14,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4919110] [2020-10-20 02:45:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:14,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4919110] [2020-10-20 02:45:14,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550107396] [2020-10-20 02:45:14,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:14,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-20 02:45:14,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:14,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 02:45:14,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:14,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:14,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:14,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 02:45:14,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841209893] [2020-10-20 02:45:14,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 02:45:14,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:14,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 02:45:14,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-20 02:45:14,400 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-10-20 02:45:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:14,710 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-20 02:45:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 02:45:14,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-20 02:45:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:14,712 INFO L225 Difference]: With dead ends: 73 [2020-10-20 02:45:14,712 INFO L226 Difference]: Without dead ends: 68 [2020-10-20 02:45:14,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-20 02:45:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-20 02:45:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-20 02:45:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 02:45:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-20 02:45:14,716 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 14 [2020-10-20 02:45:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:14,716 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-20 02:45:14,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 02:45:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-20 02:45:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 02:45:14,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:14,717 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:14,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:14,918 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:14,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:14,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 13 times [2020-10-20 02:45:14,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:14,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064687312] [2020-10-20 02:45:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:14,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064687312] [2020-10-20 02:45:14,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224712960] [2020-10-20 02:45:14,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:15,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 02:45:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:15,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:15,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:15,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 02:45:15,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184898249] [2020-10-20 02:45:15,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 02:45:15,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:15,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 02:45:15,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-20 02:45:15,136 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-20 02:45:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:15,448 INFO L93 Difference]: Finished difference Result 81 states and 191 transitions. [2020-10-20 02:45:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 02:45:15,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-20 02:45:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:15,450 INFO L225 Difference]: With dead ends: 81 [2020-10-20 02:45:15,450 INFO L226 Difference]: Without dead ends: 72 [2020-10-20 02:45:15,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-20 02:45:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-20 02:45:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-20 02:45:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-20 02:45:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-20 02:45:15,454 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-10-20 02:45:15,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:15,455 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-20 02:45:15,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 02:45:15,455 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-20 02:45:15,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 02:45:15,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:15,456 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:15,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-20 02:45:15,667 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:15,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 14 times [2020-10-20 02:45:15,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:15,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407734674] [2020-10-20 02:45:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:15,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407734674] [2020-10-20 02:45:15,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630028919] [2020-10-20 02:45:15,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:15,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:15,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:15,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 02:45:15,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:15,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:15,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 02:45:15,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141393053] [2020-10-20 02:45:15,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 02:45:15,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 02:45:15,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-20 02:45:15,856 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-20 02:45:16,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:16,219 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-20 02:45:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 02:45:16,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-20 02:45:16,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:16,220 INFO L225 Difference]: With dead ends: 82 [2020-10-20 02:45:16,220 INFO L226 Difference]: Without dead ends: 73 [2020-10-20 02:45:16,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-20 02:45:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-20 02:45:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-20 02:45:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 02:45:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-20 02:45:16,225 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-20 02:45:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:16,225 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-20 02:45:16,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 02:45:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-20 02:45:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 02:45:16,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:16,226 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:16,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-20 02:45:16,438 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:16,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:16,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 15 times [2020-10-20 02:45:16,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:16,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697833827] [2020-10-20 02:45:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:16,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697833827] [2020-10-20 02:45:16,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908452105] [2020-10-20 02:45:16,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:16,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-20 02:45:16,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:16,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 02:45:16,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:16,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:16,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:16,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 02:45:16,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571744925] [2020-10-20 02:45:16,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 02:45:16,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:16,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 02:45:16,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-20 02:45:16,631 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 12 states. [2020-10-20 02:45:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:16,934 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-20 02:45:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 02:45:16,935 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-20 02:45:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:16,936 INFO L225 Difference]: With dead ends: 72 [2020-10-20 02:45:16,936 INFO L226 Difference]: Without dead ends: 67 [2020-10-20 02:45:16,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-20 02:45:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-20 02:45:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-20 02:45:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-20 02:45:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-20 02:45:16,944 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-20 02:45:16,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:16,945 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-20 02:45:16,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 02:45:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-20 02:45:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 02:45:16,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:16,946 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:17,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-20 02:45:17,147 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:17,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 16 times [2020-10-20 02:45:17,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:17,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271267807] [2020-10-20 02:45:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:17,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271267807] [2020-10-20 02:45:17,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011664190] [2020-10-20 02:45:17,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:17,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:17,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:17,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 02:45:17,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:17,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:17,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:17,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-20 02:45:17,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631727825] [2020-10-20 02:45:17,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 02:45:17,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:17,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 02:45:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-20 02:45:17,360 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-20 02:45:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:17,546 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-20 02:45:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 02:45:17,547 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-20 02:45:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:17,548 INFO L225 Difference]: With dead ends: 72 [2020-10-20 02:45:17,548 INFO L226 Difference]: Without dead ends: 66 [2020-10-20 02:45:17,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-20 02:45:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-20 02:45:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-20 02:45:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-20 02:45:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-20 02:45:17,553 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-10-20 02:45:17,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:17,553 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-20 02:45:17,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 02:45:17,554 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-20 02:45:17,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 02:45:17,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:17,554 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:17,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-20 02:45:17,762 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:17,762 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 17 times [2020-10-20 02:45:17,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:17,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801893530] [2020-10-20 02:45:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:17,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801893530] [2020-10-20 02:45:17,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751986348] [2020-10-20 02:45:17,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:17,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-20 02:45:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:17,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 02:45:17,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:17,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:17,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:17,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 02:45:17,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089328870] [2020-10-20 02:45:17,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 02:45:17,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:17,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 02:45:17,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:17,965 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-10-20 02:45:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:18,351 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-20 02:45:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-20 02:45:18,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-20 02:45:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:18,353 INFO L225 Difference]: With dead ends: 83 [2020-10-20 02:45:18,353 INFO L226 Difference]: Without dead ends: 78 [2020-10-20 02:45:18,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-20 02:45:18,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-20 02:45:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2020-10-20 02:45:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-20 02:45:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-20 02:45:18,356 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 16 [2020-10-20 02:45:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:18,357 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-20 02:45:18,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 02:45:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-20 02:45:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 02:45:18,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:18,357 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:18,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:18,566 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:18,566 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 18 times [2020-10-20 02:45:18,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:18,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761544124] [2020-10-20 02:45:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:18,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761544124] [2020-10-20 02:45:18,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066532691] [2020-10-20 02:45:18,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:18,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-20 02:45:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 02:45:18,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:18,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:18,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:18,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 02:45:18,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410360377] [2020-10-20 02:45:18,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 02:45:18,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 02:45:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-20 02:45:18,796 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-20 02:45:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:19,221 INFO L93 Difference]: Finished difference Result 91 states and 215 transitions. [2020-10-20 02:45:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-20 02:45:19,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-20 02:45:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:19,223 INFO L225 Difference]: With dead ends: 91 [2020-10-20 02:45:19,224 INFO L226 Difference]: Without dead ends: 82 [2020-10-20 02:45:19,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-20 02:45:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-20 02:45:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-10-20 02:45:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-20 02:45:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-20 02:45:19,228 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-10-20 02:45:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:19,228 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-20 02:45:19,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 02:45:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-20 02:45:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 02:45:19,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:19,229 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:19,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:19,434 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:19,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:19,434 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 19 times [2020-10-20 02:45:19,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:19,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227795791] [2020-10-20 02:45:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:19,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227795791] [2020-10-20 02:45:19,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423798767] [2020-10-20 02:45:19,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:19,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 02:45:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:19,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:19,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:19,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 02:45:19,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711197200] [2020-10-20 02:45:19,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 02:45:19,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:19,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 02:45:19,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-20 02:45:19,651 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-20 02:45:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:20,116 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-20 02:45:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-20 02:45:20,117 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-20 02:45:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:20,117 INFO L225 Difference]: With dead ends: 92 [2020-10-20 02:45:20,117 INFO L226 Difference]: Without dead ends: 83 [2020-10-20 02:45:20,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-20 02:45:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-20 02:45:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-20 02:45:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-20 02:45:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-20 02:45:20,121 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-20 02:45:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:20,121 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-20 02:45:20,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 02:45:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-20 02:45:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 02:45:20,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:20,122 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:20,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:20,329 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:20,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:20,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 20 times [2020-10-20 02:45:20,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:20,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302890493] [2020-10-20 02:45:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:20,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302890493] [2020-10-20 02:45:20,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279589067] [2020-10-20 02:45:20,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:20,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:20,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:20,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 02:45:20,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:20,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:20,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:20,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 02:45:20,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863689018] [2020-10-20 02:45:20,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 02:45:20,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:20,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 02:45:20,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-20 02:45:20,517 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 14 states. [2020-10-20 02:45:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:20,930 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-20 02:45:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-20 02:45:20,931 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-20 02:45:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:20,932 INFO L225 Difference]: With dead ends: 80 [2020-10-20 02:45:20,932 INFO L226 Difference]: Without dead ends: 75 [2020-10-20 02:45:20,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-20 02:45:20,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-20 02:45:20,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-20 02:45:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-20 02:45:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-20 02:45:20,935 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-20 02:45:20,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:20,935 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-20 02:45:20,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 02:45:20,935 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-20 02:45:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 02:45:20,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:20,936 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:21,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-20 02:45:21,139 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:21,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:21,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 21 times [2020-10-20 02:45:21,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:21,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835413704] [2020-10-20 02:45:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:21,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835413704] [2020-10-20 02:45:21,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500514892] [2020-10-20 02:45:21,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:21,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-20 02:45:21,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:21,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 02:45:21,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:21,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:21,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:21,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-20 02:45:21,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081518284] [2020-10-20 02:45:21,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 02:45:21,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:21,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 02:45:21,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-10-20 02:45:21,358 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-20 02:45:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:21,604 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-20 02:45:21,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 02:45:21,605 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-20 02:45:21,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:21,606 INFO L225 Difference]: With dead ends: 80 [2020-10-20 02:45:21,606 INFO L226 Difference]: Without dead ends: 74 [2020-10-20 02:45:21,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-10-20 02:45:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-20 02:45:21,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-20 02:45:21,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-20 02:45:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-20 02:45:21,611 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-10-20 02:45:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:21,611 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-20 02:45:21,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 02:45:21,611 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-20 02:45:21,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 02:45:21,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:21,612 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:21,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-20 02:45:21,818 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:21,818 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 22 times [2020-10-20 02:45:21,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:21,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518440693] [2020-10-20 02:45:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:21,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518440693] [2020-10-20 02:45:21,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350255306] [2020-10-20 02:45:21,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:22,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:22,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:22,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 02:45:22,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:22,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:22,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:22,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 02:45:22,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182844165] [2020-10-20 02:45:22,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 02:45:22,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:22,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 02:45:22,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-20 02:45:22,088 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-10-20 02:45:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:22,539 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-20 02:45:22,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-20 02:45:22,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-20 02:45:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:22,541 INFO L225 Difference]: With dead ends: 93 [2020-10-20 02:45:22,541 INFO L226 Difference]: Without dead ends: 88 [2020-10-20 02:45:22,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-20 02:45:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-20 02:45:22,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 53. [2020-10-20 02:45:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-20 02:45:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-20 02:45:22,546 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 18 [2020-10-20 02:45:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:22,546 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-20 02:45:22,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 02:45:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-20 02:45:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 02:45:22,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:22,548 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:22,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-20 02:45:22,758 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 23 times [2020-10-20 02:45:22,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:22,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408883407] [2020-10-20 02:45:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:22,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408883407] [2020-10-20 02:45:22,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077792539] [2020-10-20 02:45:22,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:22,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-20 02:45:22,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:22,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 02:45:22,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:22,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:22,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:22,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 02:45:22,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323407069] [2020-10-20 02:45:22,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 02:45:22,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:22,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 02:45:22,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-20 02:45:22,957 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-20 02:45:23,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:23,519 INFO L93 Difference]: Finished difference Result 101 states and 239 transitions. [2020-10-20 02:45:23,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-20 02:45:23,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-20 02:45:23,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:23,520 INFO L225 Difference]: With dead ends: 101 [2020-10-20 02:45:23,520 INFO L226 Difference]: Without dead ends: 92 [2020-10-20 02:45:23,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-20 02:45:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-20 02:45:23,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-20 02:45:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-20 02:45:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-20 02:45:23,524 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-10-20 02:45:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:23,524 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-20 02:45:23,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 02:45:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-20 02:45:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 02:45:23,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:23,525 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:23,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-20 02:45:23,733 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:23,733 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 24 times [2020-10-20 02:45:23,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:23,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948230288] [2020-10-20 02:45:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:23,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948230288] [2020-10-20 02:45:23,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413120077] [2020-10-20 02:45:23,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:23,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-20 02:45:23,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 02:45:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:23,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:23,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-20 02:45:23,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135848750] [2020-10-20 02:45:23,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 02:45:23,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:23,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 02:45:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-20 02:45:23,940 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-20 02:45:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:24,514 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-20 02:45:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-20 02:45:24,514 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-20 02:45:24,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:24,515 INFO L225 Difference]: With dead ends: 102 [2020-10-20 02:45:24,515 INFO L226 Difference]: Without dead ends: 93 [2020-10-20 02:45:24,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-10-20 02:45:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-20 02:45:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-10-20 02:45:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-20 02:45:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-20 02:45:24,519 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-10-20 02:45:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:24,519 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-20 02:45:24,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 02:45:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-20 02:45:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 02:45:24,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:24,520 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:24,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-20 02:45:24,730 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:24,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:24,730 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 25 times [2020-10-20 02:45:24,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:24,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519891025] [2020-10-20 02:45:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:24,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519891025] [2020-10-20 02:45:24,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595554161] [2020-10-20 02:45:24,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:24,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 02:45:24,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:24,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:24,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:24,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-20 02:45:24,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853279217] [2020-10-20 02:45:24,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 02:45:24,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:24,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 02:45:24,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-20 02:45:24,937 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 16 states. [2020-10-20 02:45:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:25,498 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-10-20 02:45:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-20 02:45:25,499 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-20 02:45:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:25,500 INFO L225 Difference]: With dead ends: 88 [2020-10-20 02:45:25,500 INFO L226 Difference]: Without dead ends: 83 [2020-10-20 02:45:25,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-20 02:45:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-20 02:45:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-20 02:45:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-20 02:45:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-20 02:45:25,504 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-20 02:45:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:25,504 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-20 02:45:25,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 02:45:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-20 02:45:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 02:45:25,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:25,505 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:25,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:25,709 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 26 times [2020-10-20 02:45:25,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:25,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272394626] [2020-10-20 02:45:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:25,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272394626] [2020-10-20 02:45:25,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347836994] [2020-10-20 02:45:25,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:25,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:25,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:25,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 02:45:25,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:25,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:25,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:25,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-20 02:45:25,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612008097] [2020-10-20 02:45:25,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 02:45:25,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:25,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 02:45:25,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-20 02:45:25,967 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-20 02:45:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:26,273 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-10-20 02:45:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 02:45:26,274 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-20 02:45:26,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:26,275 INFO L225 Difference]: With dead ends: 88 [2020-10-20 02:45:26,275 INFO L226 Difference]: Without dead ends: 82 [2020-10-20 02:45:26,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-10-20 02:45:26,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-20 02:45:26,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-10-20 02:45:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-20 02:45:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-20 02:45:26,279 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-10-20 02:45:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:26,280 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-20 02:45:26,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 02:45:26,280 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-20 02:45:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 02:45:26,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:26,281 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:26,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-20 02:45:26,489 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 27 times [2020-10-20 02:45:26,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:26,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742609692] [2020-10-20 02:45:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:26,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742609692] [2020-10-20 02:45:26,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509399664] [2020-10-20 02:45:26,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:26,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-20 02:45:26,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:26,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 02:45:26,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:26,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:26,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:26,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-20 02:45:26,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489793117] [2020-10-20 02:45:26,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 02:45:26,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:26,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 02:45:26,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-20 02:45:26,842 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-10-20 02:45:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:27,597 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-20 02:45:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-20 02:45:27,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-20 02:45:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:27,599 INFO L225 Difference]: With dead ends: 103 [2020-10-20 02:45:27,599 INFO L226 Difference]: Without dead ends: 98 [2020-10-20 02:45:27,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-20 02:45:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-20 02:45:27,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2020-10-20 02:45:27,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 02:45:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-20 02:45:27,603 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 20 [2020-10-20 02:45:27,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:27,603 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-20 02:45:27,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 02:45:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-20 02:45:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 02:45:27,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:27,604 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:27,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-20 02:45:27,805 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:27,805 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 28 times [2020-10-20 02:45:27,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:27,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235872452] [2020-10-20 02:45:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:27,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235872452] [2020-10-20 02:45:27,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128134026] [2020-10-20 02:45:27,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:27,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:27,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:27,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 02:45:27,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:28,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:28,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:28,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-20 02:45:28,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169915033] [2020-10-20 02:45:28,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 02:45:28,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:28,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 02:45:28,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-20 02:45:28,034 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-10-20 02:45:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:28,762 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-20 02:45:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-20 02:45:28,764 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-20 02:45:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:28,765 INFO L225 Difference]: With dead ends: 111 [2020-10-20 02:45:28,765 INFO L226 Difference]: Without dead ends: 102 [2020-10-20 02:45:28,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-20 02:45:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-20 02:45:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-10-20 02:45:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-20 02:45:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-20 02:45:28,772 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-10-20 02:45:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:28,772 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-20 02:45:28,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 02:45:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-20 02:45:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 02:45:28,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:28,774 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:28,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:28,987 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 29 times [2020-10-20 02:45:28,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:28,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346574863] [2020-10-20 02:45:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:29,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346574863] [2020-10-20 02:45:29,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133808938] [2020-10-20 02:45:29,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:29,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-20 02:45:29,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 02:45:29,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:29,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:29,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:29,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-20 02:45:29,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177567076] [2020-10-20 02:45:29,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 02:45:29,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 02:45:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-20 02:45:29,263 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-20 02:45:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:30,116 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-20 02:45:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-20 02:45:30,117 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-20 02:45:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:30,118 INFO L225 Difference]: With dead ends: 112 [2020-10-20 02:45:30,118 INFO L226 Difference]: Without dead ends: 103 [2020-10-20 02:45:30,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-20 02:45:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-20 02:45:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-20 02:45:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 02:45:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-20 02:45:30,124 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-10-20 02:45:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:30,124 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-20 02:45:30,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 02:45:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-20 02:45:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 02:45:30,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:30,125 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:30,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:30,339 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:30,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 30 times [2020-10-20 02:45:30,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:30,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067636080] [2020-10-20 02:45:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:30,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067636080] [2020-10-20 02:45:30,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085747298] [2020-10-20 02:45:30,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:30,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-20 02:45:30,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:30,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 02:45:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:30,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:30,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:30,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-20 02:45:30,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100366592] [2020-10-20 02:45:30,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 02:45:30,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 02:45:30,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-20 02:45:30,644 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 18 states. [2020-10-20 02:45:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:31,355 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-10-20 02:45:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-20 02:45:31,358 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-20 02:45:31,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:31,359 INFO L225 Difference]: With dead ends: 96 [2020-10-20 02:45:31,359 INFO L226 Difference]: Without dead ends: 91 [2020-10-20 02:45:31,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-20 02:45:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-20 02:45:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-20 02:45:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-20 02:45:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-20 02:45:31,366 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-20 02:45:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:31,366 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-20 02:45:31,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 02:45:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-20 02:45:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 02:45:31,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:31,367 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:31,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-20 02:45:31,568 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:31,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:31,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 31 times [2020-10-20 02:45:31,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:31,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801447724] [2020-10-20 02:45:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:31,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801447724] [2020-10-20 02:45:31,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449092425] [2020-10-20 02:45:31,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:31,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-20 02:45:31,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:31,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:31,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:31,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-20 02:45:31,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045810051] [2020-10-20 02:45:31,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 02:45:31,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 02:45:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-20 02:45:31,854 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-20 02:45:32,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:32,200 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-20 02:45:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 02:45:32,201 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-20 02:45:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:32,202 INFO L225 Difference]: With dead ends: 96 [2020-10-20 02:45:32,202 INFO L226 Difference]: Without dead ends: 90 [2020-10-20 02:45:32,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-10-20 02:45:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-20 02:45:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-10-20 02:45:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-20 02:45:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-20 02:45:32,206 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-10-20 02:45:32,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:32,207 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-20 02:45:32,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 02:45:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-20 02:45:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 02:45:32,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:32,208 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:32,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:32,410 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:32,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:32,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 32 times [2020-10-20 02:45:32,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:32,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174496678] [2020-10-20 02:45:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:32,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174496678] [2020-10-20 02:45:32,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881481142] [2020-10-20 02:45:32,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:32,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:32,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 02:45:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:32,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:32,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:32,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-20 02:45:32,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705538473] [2020-10-20 02:45:32,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-20 02:45:32,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-20 02:45:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-20 02:45:32,787 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-10-20 02:45:33,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:33,596 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-20 02:45:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-20 02:45:33,597 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-20 02:45:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:33,598 INFO L225 Difference]: With dead ends: 113 [2020-10-20 02:45:33,599 INFO L226 Difference]: Without dead ends: 108 [2020-10-20 02:45:33,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-20 02:45:33,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-20 02:45:33,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 61. [2020-10-20 02:45:33,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-20 02:45:33,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-20 02:45:33,602 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 22 [2020-10-20 02:45:33,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:33,603 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-20 02:45:33,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-20 02:45:33,603 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-20 02:45:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 02:45:33,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:33,603 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:33,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-20 02:45:33,808 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:33,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 33 times [2020-10-20 02:45:33,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:33,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505314742] [2020-10-20 02:45:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:33,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505314742] [2020-10-20 02:45:33,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140801232] [2020-10-20 02:45:33,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:34,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-20 02:45:34,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:34,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-20 02:45:34,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:34,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:34,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-20 02:45:34,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313771615] [2020-10-20 02:45:34,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-20 02:45:34,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:34,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-20 02:45:34,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-20 02:45:34,068 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-10-20 02:45:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:34,869 INFO L93 Difference]: Finished difference Result 121 states and 287 transitions. [2020-10-20 02:45:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-20 02:45:34,870 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-20 02:45:34,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:34,872 INFO L225 Difference]: With dead ends: 121 [2020-10-20 02:45:34,872 INFO L226 Difference]: Without dead ends: 112 [2020-10-20 02:45:34,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-10-20 02:45:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-20 02:45:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2020-10-20 02:45:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-20 02:45:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-20 02:45:34,876 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-10-20 02:45:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:34,876 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-20 02:45:34,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-20 02:45:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-20 02:45:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 02:45:34,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:34,877 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:35,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:35,086 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:35,087 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 34 times [2020-10-20 02:45:35,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:35,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384935450] [2020-10-20 02:45:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:35,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384935450] [2020-10-20 02:45:35,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762450227] [2020-10-20 02:45:35,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:35,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:35,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:35,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-20 02:45:35,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:35,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:35,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:35,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-20 02:45:35,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389350924] [2020-10-20 02:45:35,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-20 02:45:35,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:35,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 02:45:35,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-20 02:45:35,359 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-20 02:45:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:36,257 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-20 02:45:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-20 02:45:36,257 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-20 02:45:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:36,259 INFO L225 Difference]: With dead ends: 122 [2020-10-20 02:45:36,259 INFO L226 Difference]: Without dead ends: 113 [2020-10-20 02:45:36,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-20 02:45:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-20 02:45:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-10-20 02:45:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-20 02:45:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-20 02:45:36,262 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-10-20 02:45:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:36,263 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-20 02:45:36,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-20 02:45:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-20 02:45:36,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 02:45:36,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:36,264 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:36,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-20 02:45:36,473 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:36,473 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 35 times [2020-10-20 02:45:36,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:36,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998147864] [2020-10-20 02:45:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:36,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998147864] [2020-10-20 02:45:36,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102379818] [2020-10-20 02:45:36,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:36,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-20 02:45:36,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:36,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-20 02:45:36,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:36,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:36,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:36,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-20 02:45:36,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141220917] [2020-10-20 02:45:36,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-20 02:45:36,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:36,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 02:45:36,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-20 02:45:36,721 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 20 states. [2020-10-20 02:45:37,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:37,574 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-10-20 02:45:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-20 02:45:37,575 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-20 02:45:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:37,576 INFO L225 Difference]: With dead ends: 104 [2020-10-20 02:45:37,576 INFO L226 Difference]: Without dead ends: 99 [2020-10-20 02:45:37,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-20 02:45:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-20 02:45:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-20 02:45:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-20 02:45:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-20 02:45:37,581 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-20 02:45:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:37,581 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-20 02:45:37,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-20 02:45:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-20 02:45:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 02:45:37,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:37,582 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:37,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-20 02:45:37,792 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:37,792 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 36 times [2020-10-20 02:45:37,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:37,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019606960] [2020-10-20 02:45:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:38,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019606960] [2020-10-20 02:45:38,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383898800] [2020-10-20 02:45:38,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:38,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-20 02:45:38,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:38,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 02:45:38,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:38,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:38,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:38,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-20 02:45:38,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242999903] [2020-10-20 02:45:38,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-20 02:45:38,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:38,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 02:45:38,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-20 02:45:38,163 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-20 02:45:38,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:38,604 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-10-20 02:45:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-20 02:45:38,604 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-20 02:45:38,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:38,606 INFO L225 Difference]: With dead ends: 104 [2020-10-20 02:45:38,606 INFO L226 Difference]: Without dead ends: 98 [2020-10-20 02:45:38,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-10-20 02:45:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-20 02:45:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-20 02:45:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-20 02:45:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-20 02:45:38,613 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-10-20 02:45:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:38,613 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-20 02:45:38,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-20 02:45:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-20 02:45:38,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 02:45:38,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:38,615 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:38,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-20 02:45:38,821 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 37 times [2020-10-20 02:45:38,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:38,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197386885] [2020-10-20 02:45:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:38,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197386885] [2020-10-20 02:45:38,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088969892] [2020-10-20 02:45:38,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:39,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 02:45:39,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:39,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:39,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:39,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-20 02:45:39,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909066406] [2020-10-20 02:45:39,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 02:45:39,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 02:45:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-20 02:45:39,092 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-10-20 02:45:40,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:40,006 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-20 02:45:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-20 02:45:40,006 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-20 02:45:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:40,007 INFO L225 Difference]: With dead ends: 123 [2020-10-20 02:45:40,007 INFO L226 Difference]: Without dead ends: 118 [2020-10-20 02:45:40,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-20 02:45:40,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-20 02:45:40,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2020-10-20 02:45:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-20 02:45:40,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-20 02:45:40,011 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 24 [2020-10-20 02:45:40,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:40,012 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-20 02:45:40,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 02:45:40,012 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-20 02:45:40,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 02:45:40,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:40,012 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:40,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-20 02:45:40,221 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:40,221 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 38 times [2020-10-20 02:45:40,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:40,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216236978] [2020-10-20 02:45:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:40,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216236978] [2020-10-20 02:45:40,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924091345] [2020-10-20 02:45:40,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:40,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:40,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 02:45:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:40,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:40,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-20 02:45:40,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431033231] [2020-10-20 02:45:40,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 02:45:40,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:40,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 02:45:40,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-20 02:45:40,513 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-10-20 02:45:41,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:41,418 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-20 02:45:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-20 02:45:41,418 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-20 02:45:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:41,420 INFO L225 Difference]: With dead ends: 131 [2020-10-20 02:45:41,420 INFO L226 Difference]: Without dead ends: 122 [2020-10-20 02:45:41,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-10-20 02:45:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-20 02:45:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2020-10-20 02:45:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-20 02:45:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-20 02:45:41,424 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-10-20 02:45:41,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:41,424 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-20 02:45:41,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 02:45:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-20 02:45:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 02:45:41,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:41,425 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:41,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-20 02:45:41,635 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:41,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 39 times [2020-10-20 02:45:41,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:41,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093255474] [2020-10-20 02:45:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:41,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093255474] [2020-10-20 02:45:41,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647598645] [2020-10-20 02:45:41,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:41,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-20 02:45:41,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:41,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 02:45:41,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:41,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:42,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:42,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-20 02:45:42,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2883800] [2020-10-20 02:45:42,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-20 02:45:42,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:42,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-20 02:45:42,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-20 02:45:42,013 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-20 02:45:42,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:42,999 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-20 02:45:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-20 02:45:43,000 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-20 02:45:43,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:43,001 INFO L225 Difference]: With dead ends: 132 [2020-10-20 02:45:43,001 INFO L226 Difference]: Without dead ends: 123 [2020-10-20 02:45:43,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-20 02:45:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-20 02:45:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-10-20 02:45:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-20 02:45:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-20 02:45:43,007 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-10-20 02:45:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:43,007 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-20 02:45:43,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-20 02:45:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-20 02:45:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 02:45:43,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:43,016 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:43,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-20 02:45:43,226 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:43,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:43,226 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 40 times [2020-10-20 02:45:43,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:43,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542475846] [2020-10-20 02:45:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:43,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542475846] [2020-10-20 02:45:43,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135448671] [2020-10-20 02:45:43,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:43,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 02:45:43,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:43,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 02:45:43,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:43,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:43,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:43,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-20 02:45:43,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831891278] [2020-10-20 02:45:43,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-20 02:45:43,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:43,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-20 02:45:43,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-20 02:45:43,524 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 22 states. [2020-10-20 02:45:44,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:44,646 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-10-20 02:45:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-20 02:45:44,647 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-20 02:45:44,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:44,648 INFO L225 Difference]: With dead ends: 112 [2020-10-20 02:45:44,648 INFO L226 Difference]: Without dead ends: 107 [2020-10-20 02:45:44,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-20 02:45:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-20 02:45:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-20 02:45:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-20 02:45:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-20 02:45:44,652 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-20 02:45:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:44,652 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-20 02:45:44,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-20 02:45:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-20 02:45:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 02:45:44,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:44,653 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:44,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-20 02:45:44,864 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:44,864 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 41 times [2020-10-20 02:45:44,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:44,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514261968] [2020-10-20 02:45:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:45,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514261968] [2020-10-20 02:45:45,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514226980] [2020-10-20 02:45:45,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:45,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-20 02:45:45,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-20 02:45:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:45,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:45,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:45,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-20 02:45:45,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132903827] [2020-10-20 02:45:45,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-20 02:45:45,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:45,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-20 02:45:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-20 02:45:45,232 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-20 02:45:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:45,744 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-20 02:45:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-20 02:45:45,745 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-20 02:45:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:45,747 INFO L225 Difference]: With dead ends: 112 [2020-10-20 02:45:45,747 INFO L226 Difference]: Without dead ends: 106 [2020-10-20 02:45:45,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-10-20 02:45:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-20 02:45:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-10-20 02:45:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-20 02:45:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-20 02:45:45,751 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-10-20 02:45:45,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:45,751 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-20 02:45:45,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-20 02:45:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-20 02:45:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 02:45:45,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:45,752 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:45,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:45,961 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:45,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:45,962 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 42 times [2020-10-20 02:45:45,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:45,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032826864] [2020-10-20 02:45:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:46,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032826864] [2020-10-20 02:45:46,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493304214] [2020-10-20 02:45:46,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:46,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-20 02:45:46,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:46,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 02:45:46,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:46,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:46,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:46,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-20 02:45:46,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025556150] [2020-10-20 02:45:46,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-20 02:45:46,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:46,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 02:45:46,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-20 02:45:46,304 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-10-20 02:45:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:47,524 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-20 02:45:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-20 02:45:47,525 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-20 02:45:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:47,526 INFO L225 Difference]: With dead ends: 133 [2020-10-20 02:45:47,527 INFO L226 Difference]: Without dead ends: 128 [2020-10-20 02:45:47,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-20 02:45:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-20 02:45:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2020-10-20 02:45:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-20 02:45:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-20 02:45:47,535 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 26 [2020-10-20 02:45:47,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:47,535 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-20 02:45:47,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-20 02:45:47,535 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-20 02:45:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 02:45:47,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:47,536 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:47,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-20 02:45:47,747 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:47,748 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 43 times [2020-10-20 02:45:47,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:47,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026646447] [2020-10-20 02:45:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:48,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026646447] [2020-10-20 02:45:48,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982023213] [2020-10-20 02:45:48,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:48,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 02:45:48,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:48,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:48,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:48,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-20 02:45:48,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059277663] [2020-10-20 02:45:48,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-20 02:45:48,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:48,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 02:45:48,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-20 02:45:48,110 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-10-20 02:45:49,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:49,340 INFO L93 Difference]: Finished difference Result 141 states and 335 transitions. [2020-10-20 02:45:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-20 02:45:49,341 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-20 02:45:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:49,343 INFO L225 Difference]: With dead ends: 141 [2020-10-20 02:45:49,343 INFO L226 Difference]: Without dead ends: 132 [2020-10-20 02:45:49,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-20 02:45:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-20 02:45:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-10-20 02:45:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-20 02:45:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-20 02:45:49,347 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-10-20 02:45:49,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:49,347 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-20 02:45:49,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-20 02:45:49,348 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-20 02:45:49,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 02:45:49,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:49,348 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:49,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:49,550 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:49,551 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 44 times [2020-10-20 02:45:49,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:49,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023820814] [2020-10-20 02:45:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:49,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023820814] [2020-10-20 02:45:49,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606680916] [2020-10-20 02:45:49,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:49,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 02:45:49,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-20 02:45:49,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:49,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 02:45:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:49,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:49,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-20 02:45:49,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557635868] [2020-10-20 02:45:49,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-20 02:45:49,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:49,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-20 02:45:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-20 02:45:49,909 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-20 02:45:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:51,187 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-20 02:45:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-20 02:45:51,189 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-20 02:45:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:51,190 INFO L225 Difference]: With dead ends: 142 [2020-10-20 02:45:51,190 INFO L226 Difference]: Without dead ends: 133 [2020-10-20 02:45:51,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-20 02:45:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-20 02:45:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-10-20 02:45:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-20 02:45:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-20 02:45:51,193 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-10-20 02:45:51,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:51,193 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-20 02:45:51,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-20 02:45:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-20 02:45:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 02:45:51,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:51,194 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:51,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-20 02:45:51,402 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 45 times [2020-10-20 02:45:51,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:51,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091744700] [2020-10-20 02:45:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:45:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:51,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091744700] [2020-10-20 02:45:51,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934991988] [2020-10-20 02:45:51,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:51,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-20 02:45:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 02:45:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-20 02:45:51,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 02:45:51,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 02:45:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:45:51,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 02:45:51,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-20 02:45:51,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288400854] [2020-10-20 02:45:51,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-20 02:45:51,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:45:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-20 02:45:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-20 02:45:51,760 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 24 states. [2020-10-20 02:45:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:45:53,005 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-10-20 02:45:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-20 02:45:53,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-20 02:45:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:45:53,007 INFO L225 Difference]: With dead ends: 120 [2020-10-20 02:45:53,007 INFO L226 Difference]: Without dead ends: 115 [2020-10-20 02:45:53,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-20 02:45:53,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-20 02:45:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-20 02:45:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-20 02:45:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-20 02:45:53,011 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-20 02:45:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:45:53,011 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-20 02:45:53,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-20 02:45:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-20 02:45:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 02:45:53,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:45:53,012 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:45:53,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 02:45:53,220 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:45:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:45:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 46 times [2020-10-20 02:45:53,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:45:53,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235499998] [2020-10-20 02:45:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:45:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 02:45:53,235 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 02:45:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 02:45:53,270 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 02:45:53,310 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 02:45:53,310 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 02:45:53,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-20 02:45:53,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 02:45:53 BasicIcfg [2020-10-20 02:45:53,396 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 02:45:53,396 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 02:45:53,396 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 02:45:53,397 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 02:45:53,397 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:45:05" (3/4) ... [2020-10-20 02:45:53,400 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 02:45:53,478 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 02:45:53,478 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 02:45:53,480 INFO L168 Benchmark]: Toolchain (without parser) took 48805.81 ms. Allocated memory was 40.4 MB in the beginning and 145.2 MB in the end (delta: 104.9 MB). Free memory was 16.4 MB in the beginning and 9.7 MB in the end (delta: 6.8 MB). Peak memory consumption was 111.6 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:53,480 INFO L168 Benchmark]: CDTParser took 0.87 ms. Allocated memory is still 30.4 MB. Free memory was 6.6 MB in the beginning and 6.6 MB in the end (delta: 63.1 kB). Peak memory consumption was 63.1 kB. Max. memory is 14.3 GB. [2020-10-20 02:45:53,481 INFO L168 Benchmark]: CACSL2BoogieTranslator took 647.18 ms. Allocated memory was 40.4 MB in the beginning and 42.5 MB in the end (delta: 2.1 MB). Free memory was 15.6 MB in the beginning and 10.4 MB in the end (delta: 5.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:53,481 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.32 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 10.4 MB in the beginning and 26.8 MB in the end (delta: -16.3 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 02:45:53,482 INFO L168 Benchmark]: Boogie Preprocessor took 26.25 ms. Allocated memory is still 43.0 MB. Free memory was 26.8 MB in the beginning and 25.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:53,482 INFO L168 Benchmark]: RCFGBuilder took 440.45 ms. Allocated memory was 43.0 MB in the beginning and 44.0 MB in the end (delta: 1.0 MB). Free memory was 25.1 MB in the beginning and 17.5 MB in the end (delta: 7.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:53,488 INFO L168 Benchmark]: TraceAbstraction took 47511.86 ms. Allocated memory was 44.0 MB in the beginning and 145.2 MB in the end (delta: 101.2 MB). Free memory was 16.9 MB in the beginning and 17.6 MB in the end (delta: -648.2 kB). Peak memory consumption was 100.5 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:53,488 INFO L168 Benchmark]: Witness Printer took 82.11 ms. Allocated memory is still 145.2 MB. Free memory was 17.6 MB in the beginning and 9.7 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. [2020-10-20 02:45:53,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.87 ms. Allocated memory is still 30.4 MB. Free memory was 6.6 MB in the beginning and 6.6 MB in the end (delta: 63.1 kB). Peak memory consumption was 63.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 647.18 ms. Allocated memory was 40.4 MB in the beginning and 42.5 MB in the end (delta: 2.1 MB). Free memory was 15.6 MB in the beginning and 10.4 MB in the end (delta: 5.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 86.32 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 10.4 MB in the beginning and 26.8 MB in the end (delta: -16.3 MB). There was no memory consumed. Max. memory is 14.3 GB. * Boogie Preprocessor took 26.25 ms. Allocated memory is still 43.0 MB. Free memory was 26.8 MB in the beginning and 25.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 440.45 ms. Allocated memory was 43.0 MB in the beginning and 44.0 MB in the end (delta: 1.0 MB). Free memory was 25.1 MB in the beginning and 17.5 MB in the end (delta: 7.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 47511.86 ms. Allocated memory was 44.0 MB in the beginning and 145.2 MB in the end (delta: 101.2 MB). Free memory was 16.9 MB in the beginning and 17.6 MB in the end (delta: -648.2 kB). Peak memory consumption was 100.5 MB. Max. memory is 14.3 GB. * Witness Printer took 82.11 ms. Allocated memory is still 145.2 MB. Free memory was 17.6 MB in the beginning and 9.7 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 785 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.2s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; [L704] 0 pthread_t id1, id2; [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L708] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L688] COND TRUE 1 k < 10 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=10] [L696] COND TRUE 2 k < 10 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L711] 0 int condJ = j >= (2*10 +6); [L713] COND TRUE 0 condI || condJ [L685] COND FALSE 0 !(0) [L685] 0 __assert_fail ("0", "triangular-longer-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 47.2s, OverallIterations: 48, TraceHistogramMax: 10, AutomataDifference: 24.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 734 SDtfs, 2945 SDslu, 3072 SDs, 0 SdLazy, 3707 SolverSat, 2422 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2184 GetRequests, 688 SyntacticMatches, 34 SemanticMatches, 1462 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14700 ImplicationChecksByTransitivity, 23.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 47 MinimizatonAttempts, 1162 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 1668 NumberOfCodeBlocks, 1668 NumberOfCodeBlocksAsserted, 204 NumberOfCheckSat, 1551 ConstructedInterpolants, 0 QuantifiedInterpolants, 122223 SizeOfPredicates, 470 NumberOfNonLiveVariables, 5586 ConjunctsInSsa, 643 ConjunctsInUnsatCore, 89 InterpolantComputations, 5 PerfectInterpolantSequences, 0/2580 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...