./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e24917ef8695200a643e71e238ee3c2cc9fb2120 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:28:39,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:28:39,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:28:39,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:28:39,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:28:39,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:28:39,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:28:39,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:28:39,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:28:39,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:28:39,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:28:39,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:28:39,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:28:39,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:28:39,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:28:39,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:28:39,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:28:39,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:28:39,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:28:39,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:28:39,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:28:39,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:28:39,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:28:39,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:28:39,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:28:39,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:28:39,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:28:39,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:28:39,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:28:39,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:28:39,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:28:39,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:28:39,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:28:39,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:28:39,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:28:39,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:28:39,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:28:39,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:28:39,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:28:39,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:28:39,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:28:39,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:28:39,461 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:28:39,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:28:39,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:28:39,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:28:39,463 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:28:39,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:28:39,463 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:28:39,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:28:39,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:28:39,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:28:39,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:28:39,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:28:39,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:28:39,464 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:28:39,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:28:39,464 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:28:39,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:28:39,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:28:39,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:28:39,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:28:39,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:28:39,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:28:39,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:28:39,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:28:39,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:28:39,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:28:39,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:28:39,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:28:39,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:28:39,466 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer 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(__VERIFIER_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 -> e24917ef8695200a643e71e238ee3c2cc9fb2120 [2019-12-07 18:28:39,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:28:39,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:28:39,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:28:39,585 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:28:39,585 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:28:39,586 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2019-12-07 18:28:39,628 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/data/a3c31835d/5f16fa09e7de40c8bef0bec021b8791b/FLAG7d5ee50f6 [2019-12-07 18:28:40,071 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:28:40,071 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/sv-benchmarks/c/pthread/triangular-longer-1.i [2019-12-07 18:28:40,081 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/data/a3c31835d/5f16fa09e7de40c8bef0bec021b8791b/FLAG7d5ee50f6 [2019-12-07 18:28:40,089 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/data/a3c31835d/5f16fa09e7de40c8bef0bec021b8791b [2019-12-07 18:28:40,091 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:28:40,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:28:40,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:28:40,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:28:40,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:28:40,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:28:40" (1/1) ... [2019-12-07 18:28:40,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e22e081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40, skipping insertion in model container [2019-12-07 18:28:40,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:28:40" (1/1) ... [2019-12-07 18:28:40,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:28:40,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:28:40,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:28:40,374 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:28:40,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:28:40,446 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:28:40,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40 WrapperNode [2019-12-07 18:28:40,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:28:40,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:28:40,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:28:40,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:28:40,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40" (1/1) ... [2019-12-07 18:28:40,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40" (1/1) ... [2019-12-07 18:28:40,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:28:40,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:28:40,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:28:40,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:28:40,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40" (1/1) ... [2019-12-07 18:28:40,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40" (1/1) ... [2019-12-07 18:28:40,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40" (1/1) ... [2019-12-07 18:28:40,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40" (1/1) ... [2019-12-07 18:28:40,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40" (1/1) ... [2019-12-07 18:28:40,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40" (1/1) ... [2019-12-07 18:28:40,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40" (1/1) ... [2019-12-07 18:28:40,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:28:40,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:28:40,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:28:40,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:28:40,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:40,547 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-07 18:28:40,547 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-07 18:28:40,548 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-07 18:28:40,548 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-07 18:28:40,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 18:28:40,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-07 18:28:40,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 18:28:40,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 18:28:40,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-07 18:28:40,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:28:40,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:28:40,549 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-07 18:28:40,736 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:28:40,736 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 18:28:40,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:28:40 BoogieIcfgContainer [2019-12-07 18:28:40,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:28:40,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:28:40,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:28:40,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:28:40,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:28:40" (1/3) ... [2019-12-07 18:28:40,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a24be25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:28:40, skipping insertion in model container [2019-12-07 18:28:40,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:28:40" (2/3) ... [2019-12-07 18:28:40,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a24be25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:28:40, skipping insertion in model container [2019-12-07 18:28:40,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:28:40" (3/3) ... [2019-12-07 18:28:40,741 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2019-12-07 18:28:40,748 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-07 18:28:40,748 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:28:40,752 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 18:28:40,753 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-07 18:28:40,769 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,769 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,769 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,769 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,770 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,770 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,770 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,770 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,770 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,770 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,770 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,771 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,771 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,771 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,771 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,771 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,771 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,771 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,772 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,772 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,772 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,772 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,772 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,772 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,772 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,772 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,773 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,773 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 18:28:40,785 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-07 18:28:40,799 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:28:40,800 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:28:40,800 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:28:40,800 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:28:40,800 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:28:40,800 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:28:40,800 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:28:40,800 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:28:40,812 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-07 18:28:40,814 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-07 18:28:40,843 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-07 18:28:40,844 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 18:28:40,849 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 92 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-07 18:28:40,851 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-07 18:28:40,861 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-07 18:28:40,861 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 18:28:40,862 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 92 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-07 18:28:40,864 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-07 18:28:40,865 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-07 18:28:41,546 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-07 18:28:41,547 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-07 18:28:41,549 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-07 18:28:41,555 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-07 18:28:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-07 18:28:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 18:28:41,561 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:41,561 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 18:28:41,561 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:41,565 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-07 18:28:41,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:41,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538448826] [2019-12-07 18:28:41,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:41,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538448826] [2019-12-07 18:28:41,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:28:41,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 18:28:41,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631836362] [2019-12-07 18:28:41,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 18:28:41,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:41,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 18:28:41,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:28:41,731 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-07 18:28:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:41,753 INFO L93 Difference]: Finished difference Result 44 states and 107 transitions. [2019-12-07 18:28:41,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 18:28:41,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-07 18:28:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:41,762 INFO L225 Difference]: With dead ends: 44 [2019-12-07 18:28:41,762 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 18:28:41,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 18:28:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 18:28:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 18:28:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:28:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 56 transitions. [2019-12-07 18:28:41,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 56 transitions. Word has length 5 [2019-12-07 18:28:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:41,788 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 56 transitions. [2019-12-07 18:28:41,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 18:28:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 56 transitions. [2019-12-07 18:28:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 18:28:41,789 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:41,789 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:41,789 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:41,789 INFO L82 PathProgramCache]: Analyzing trace with hash 232910220, now seen corresponding path program 1 times [2019-12-07 18:28:41,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:41,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420754936] [2019-12-07 18:28:41,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:41,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420754936] [2019-12-07 18:28:41,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:28:41,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 18:28:41,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452892029] [2019-12-07 18:28:41,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:28:41,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:28:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:28:41,852 INFO L87 Difference]: Start difference. First operand 26 states and 56 transitions. Second operand 4 states. [2019-12-07 18:28:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:41,878 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-07 18:28:41,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:28:41,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 18:28:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:41,880 INFO L225 Difference]: With dead ends: 40 [2019-12-07 18:28:41,880 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 18:28:41,880 INFO L630 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 [2019-12-07 18:28:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 18:28:41,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-12-07 18:28:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:28:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-07 18:28:41,884 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 7 [2019-12-07 18:28:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:41,885 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-07 18:28:41,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:28:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-07 18:28:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 18:28:41,885 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:41,886 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:41,886 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:41,886 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-07 18:28:41,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:41,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426517715] [2019-12-07 18:28:41,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:41,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426517715] [2019-12-07 18:28:41,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:28:41,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:28:41,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200049395] [2019-12-07 18:28:41,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:28:41,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:41,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:28:41,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:28:41,944 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 5 states. [2019-12-07 18:28:41,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:41,978 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-07 18:28:41,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:28:41,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 18:28:41,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:41,979 INFO L225 Difference]: With dead ends: 38 [2019-12-07 18:28:41,979 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 18:28:41,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:28:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 18:28:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-07 18:28:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 18:28:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-07 18:28:41,983 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-07 18:28:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:41,983 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-07 18:28:41,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:28:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-07 18:28:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 18:28:41,984 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:41,984 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:41,984 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:41,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 2 times [2019-12-07 18:28:41,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:41,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61680471] [2019-12-07 18:28:41,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:42,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61680471] [2019-12-07 18:28:42,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620943301] [2019-12-07 18:28:42,056 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:42,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:28:42,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:42,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 18:28:42,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:42,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:42,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-07 18:28:42,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121748905] [2019-12-07 18:28:42,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:28:42,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:42,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:28:42,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:28:42,127 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 7 states. [2019-12-07 18:28:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:42,177 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-07 18:28:42,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:28:42,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-07 18:28:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:42,178 INFO L225 Difference]: With dead ends: 37 [2019-12-07 18:28:42,178 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 18:28:42,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:28:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 18:28:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-12-07 18:28:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 18:28:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 67 transitions. [2019-12-07 18:28:42,181 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 67 transitions. Word has length 10 [2019-12-07 18:28:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:42,182 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 67 transitions. [2019-12-07 18:28:42,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:28:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 67 transitions. [2019-12-07 18:28:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 18:28:42,182 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:42,182 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:42,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:42,383 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:42,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:42,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 3 times [2019-12-07 18:28:42,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:42,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331368433] [2019-12-07 18:28:42,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:42,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331368433] [2019-12-07 18:28:42,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390391349] [2019-12-07 18:28:42,439 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:42,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 18:28:42,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:42,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 18:28:42,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:42,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:42,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-07 18:28:42,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479427914] [2019-12-07 18:28:42,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:28:42,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:28:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:28:42,486 INFO L87 Difference]: Start difference. First operand 32 states and 67 transitions. Second operand 8 states. [2019-12-07 18:28:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:42,532 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-07 18:28:42,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:28:42,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-07 18:28:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:42,533 INFO L225 Difference]: With dead ends: 41 [2019-12-07 18:28:42,533 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 18:28:42,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:28:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 18:28:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-07 18:28:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:28:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-07 18:28:42,537 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 11 [2019-12-07 18:28:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:42,537 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-07 18:28:42,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:28:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-07 18:28:42,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 18:28:42,537 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:42,537 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:42,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:42,738 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:42,739 INFO L82 PathProgramCache]: Analyzing trace with hash -466461753, now seen corresponding path program 4 times [2019-12-07 18:28:42,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:42,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703809056] [2019-12-07 18:28:42,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:42,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703809056] [2019-12-07 18:28:42,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896237004] [2019-12-07 18:28:42,809 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:42,845 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:28:42,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:42,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 18:28:42,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:42,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:42,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-07 18:28:42,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457488868] [2019-12-07 18:28:42,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:28:42,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:42,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:28:42,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:28:42,856 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 8 states. [2019-12-07 18:28:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:42,905 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-07 18:28:42,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 18:28:42,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-07 18:28:42,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:42,906 INFO L225 Difference]: With dead ends: 46 [2019-12-07 18:28:42,906 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 18:28:42,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:28:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 18:28:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2019-12-07 18:28:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 18:28:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-12-07 18:28:42,911 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 12 [2019-12-07 18:28:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:42,912 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-12-07 18:28:42,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:28:42,912 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-12-07 18:28:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 18:28:42,913 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:42,913 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:43,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:43,114 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973298, now seen corresponding path program 5 times [2019-12-07 18:28:43,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:43,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505726037] [2019-12-07 18:28:43,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:43,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505726037] [2019-12-07 18:28:43,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159055624] [2019-12-07 18:28:43,188 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:43,221 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-07 18:28:43,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:43,222 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 18:28:43,223 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:43,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:43,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 18:28:43,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556624866] [2019-12-07 18:28:43,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 18:28:43,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:43,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 18:28:43,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:28:43,235 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 9 states. [2019-12-07 18:28:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:43,292 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-07 18:28:43,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 18:28:43,293 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-07 18:28:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:43,293 INFO L225 Difference]: With dead ends: 46 [2019-12-07 18:28:43,294 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 18:28:43,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:28:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 18:28:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2019-12-07 18:28:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 18:28:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-07 18:28:43,298 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 13 [2019-12-07 18:28:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:43,298 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-07 18:28:43,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 18:28:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-07 18:28:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 18:28:43,299 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:43,299 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:43,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:43,499 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:43,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 6 times [2019-12-07 18:28:43,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:43,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50383744] [2019-12-07 18:28:43,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:43,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50383744] [2019-12-07 18:28:43,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415409622] [2019-12-07 18:28:43,566 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:43,599 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-07 18:28:43,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:43,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 18:28:43,600 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:43,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:43,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-07 18:28:43,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289818510] [2019-12-07 18:28:43,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 18:28:43,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:43,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 18:28:43,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:28:43,611 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 10 states. [2019-12-07 18:28:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:43,682 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-07 18:28:43,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:28:43,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-07 18:28:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:43,682 INFO L225 Difference]: With dead ends: 47 [2019-12-07 18:28:43,683 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 18:28:43,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:28:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 18:28:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-12-07 18:28:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-07 18:28:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 77 transitions. [2019-12-07 18:28:43,686 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 77 transitions. Word has length 13 [2019-12-07 18:28:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:43,686 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 77 transitions. [2019-12-07 18:28:43,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 18:28:43,686 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 77 transitions. [2019-12-07 18:28:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 18:28:43,686 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:43,686 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:43,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:43,887 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:43,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:43,888 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 7 times [2019-12-07 18:28:43,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:43,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302518151] [2019-12-07 18:28:43,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:43,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302518151] [2019-12-07 18:28:43,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774895781] [2019-12-07 18:28:43,976 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:44,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 18:28:44,010 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:44,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:44,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-07 18:28:44,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467257292] [2019-12-07 18:28:44,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 18:28:44,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:44,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 18:28:44,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:28:44,022 INFO L87 Difference]: Start difference. First operand 37 states and 77 transitions. Second operand 11 states. [2019-12-07 18:28:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:44,122 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-07 18:28:44,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 18:28:44,122 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-07 18:28:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:44,122 INFO L225 Difference]: With dead ends: 46 [2019-12-07 18:28:44,122 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 18:28:44,123 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:28:44,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 18:28:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2019-12-07 18:28:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:28:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-07 18:28:44,125 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-07 18:28:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:44,125 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-07 18:28:44,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 18:28:44,126 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-07 18:28:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 18:28:44,126 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:44,126 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:44,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:44,327 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:44,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 8 times [2019-12-07 18:28:44,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:44,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672749356] [2019-12-07 18:28:44,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:44,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672749356] [2019-12-07 18:28:44,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679993593] [2019-12-07 18:28:44,460 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:44,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:28:44,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:44,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 18:28:44,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:44,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:44,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-07 18:28:44,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343845033] [2019-12-07 18:28:44,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 18:28:44,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:44,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 18:28:44,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-12-07 18:28:44,513 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 11 states. [2019-12-07 18:28:44,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:44,602 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-07 18:28:44,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:28:44,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-07 18:28:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:44,602 INFO L225 Difference]: With dead ends: 45 [2019-12-07 18:28:44,603 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 18:28:44,603 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:28:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 18:28:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2019-12-07 18:28:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 18:28:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-07 18:28:44,605 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 14 [2019-12-07 18:28:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:44,605 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-07 18:28:44,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 18:28:44,606 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-07 18:28:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 18:28:44,606 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:44,606 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:44,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:44,807 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:44,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 9 times [2019-12-07 18:28:44,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:44,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050658112] [2019-12-07 18:28:44,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:44,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050658112] [2019-12-07 18:28:44,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212190167] [2019-12-07 18:28:44,961 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:45,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 18:28:45,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:45,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 18:28:45,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:45,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:45,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-07 18:28:45,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918392755] [2019-12-07 18:28:45,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 18:28:45,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:45,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 18:28:45,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-07 18:28:45,053 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 12 states. [2019-12-07 18:28:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:45,160 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-12-07 18:28:45,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 18:28:45,160 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-07 18:28:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:45,161 INFO L225 Difference]: With dead ends: 49 [2019-12-07 18:28:45,161 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 18:28:45,162 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2019-12-07 18:28:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 18:28:45,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-12-07 18:28:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 18:28:45,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 87 transitions. [2019-12-07 18:28:45,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 87 transitions. Word has length 15 [2019-12-07 18:28:45,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:45,165 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 87 transitions. [2019-12-07 18:28:45,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 18:28:45,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 87 transitions. [2019-12-07 18:28:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 18:28:45,166 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:45,166 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:45,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:45,367 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:45,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 10 times [2019-12-07 18:28:45,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:45,367 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140347748] [2019-12-07 18:28:45,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:45,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140347748] [2019-12-07 18:28:45,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317995127] [2019-12-07 18:28:45,463 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:45,503 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:28:45,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:45,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 18:28:45,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:45,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:45,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-07 18:28:45,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493241480] [2019-12-07 18:28:45,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 18:28:45,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:45,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 18:28:45,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:28:45,520 INFO L87 Difference]: Start difference. First operand 42 states and 87 transitions. Second operand 13 states. [2019-12-07 18:28:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:45,643 INFO L93 Difference]: Finished difference Result 51 states and 104 transitions. [2019-12-07 18:28:45,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:28:45,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-07 18:28:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:45,644 INFO L225 Difference]: With dead ends: 51 [2019-12-07 18:28:45,644 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 18:28:45,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2019-12-07 18:28:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 18:28:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-12-07 18:28:45,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 18:28:45,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 91 transitions. [2019-12-07 18:28:45,648 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 91 transitions. Word has length 16 [2019-12-07 18:28:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:45,648 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 91 transitions. [2019-12-07 18:28:45,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 18:28:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 91 transitions. [2019-12-07 18:28:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 18:28:45,649 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:45,649 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:45,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:45,850 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:45,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090750, now seen corresponding path program 11 times [2019-12-07 18:28:45,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:45,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124161576] [2019-12-07 18:28:45,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:46,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124161576] [2019-12-07 18:28:46,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105024336] [2019-12-07 18:28:46,000 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:46,032 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-07 18:28:46,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:46,033 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 18:28:46,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:46,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:46,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-07 18:28:46,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371509184] [2019-12-07 18:28:46,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 18:28:46,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:46,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 18:28:46,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-12-07 18:28:46,046 INFO L87 Difference]: Start difference. First operand 44 states and 91 transitions. Second operand 13 states. [2019-12-07 18:28:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:46,152 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-12-07 18:28:46,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 18:28:46,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-12-07 18:28:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:46,153 INFO L225 Difference]: With dead ends: 54 [2019-12-07 18:28:46,153 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 18:28:46,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2019-12-07 18:28:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 18:28:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2019-12-07 18:28:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 18:28:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 93 transitions. [2019-12-07 18:28:46,156 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 93 transitions. Word has length 17 [2019-12-07 18:28:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:46,156 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 93 transitions. [2019-12-07 18:28:46,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 18:28:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 93 transitions. [2019-12-07 18:28:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 18:28:46,156 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:46,156 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:46,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:46,358 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:46,358 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 12 times [2019-12-07 18:28:46,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:46,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121190220] [2019-12-07 18:28:46,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:46,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121190220] [2019-12-07 18:28:46,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841875842] [2019-12-07 18:28:46,530 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:46,605 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-07 18:28:46,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:46,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 18:28:46,608 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:46,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:46,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-07 18:28:46,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63410654] [2019-12-07 18:28:46,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 18:28:46,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:46,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 18:28:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:28:46,644 INFO L87 Difference]: Start difference. First operand 45 states and 93 transitions. Second operand 15 states. [2019-12-07 18:28:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:47,042 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-12-07 18:28:47,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:28:47,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-07 18:28:47,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:47,044 INFO L225 Difference]: With dead ends: 54 [2019-12-07 18:28:47,044 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 18:28:47,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2019-12-07 18:28:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 18:28:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 30. [2019-12-07 18:28:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 18:28:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-07 18:28:47,049 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 18 [2019-12-07 18:28:47,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:47,049 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-07 18:28:47,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 18:28:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-07 18:28:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 18:28:47,050 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:47,051 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:47,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:47,251 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:47,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:47,252 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 13 times [2019-12-07 18:28:47,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:47,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415223479] [2019-12-07 18:28:47,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:47,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415223479] [2019-12-07 18:28:47,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038121357] [2019-12-07 18:28:47,337 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:47,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 18:28:47,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:47,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:47,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-07 18:28:47,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083023354] [2019-12-07 18:28:47,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 18:28:47,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:47,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 18:28:47,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-12-07 18:28:47,384 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 15 states. [2019-12-07 18:28:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:47,519 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-12-07 18:28:47,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 18:28:47,520 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-07 18:28:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:47,520 INFO L225 Difference]: With dead ends: 54 [2019-12-07 18:28:47,520 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 18:28:47,521 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2019-12-07 18:28:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 18:28:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2019-12-07 18:28:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-07 18:28:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 99 transitions. [2019-12-07 18:28:47,523 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 99 transitions. Word has length 18 [2019-12-07 18:28:47,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:47,523 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 99 transitions. [2019-12-07 18:28:47,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 18:28:47,523 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 99 transitions. [2019-12-07 18:28:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 18:28:47,523 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:47,524 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:47,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:47,724 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2080307442, now seen corresponding path program 14 times [2019-12-07 18:28:47,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:47,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909876957] [2019-12-07 18:28:47,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:47,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909876957] [2019-12-07 18:28:47,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106691022] [2019-12-07 18:28:47,915 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:47,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:28:47,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:47,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 18:28:47,955 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:47,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:47,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-07 18:28:47,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832913] [2019-12-07 18:28:47,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 18:28:47,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:47,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 18:28:47,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:28:47,970 INFO L87 Difference]: Start difference. First operand 48 states and 99 transitions. Second operand 16 states. [2019-12-07 18:28:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:48,119 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-07 18:28:48,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 18:28:48,119 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-07 18:28:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:48,120 INFO L225 Difference]: With dead ends: 57 [2019-12-07 18:28:48,120 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 18:28:48,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2019-12-07 18:28:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 18:28:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2019-12-07 18:28:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 18:28:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-07 18:28:48,122 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 19 [2019-12-07 18:28:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:48,122 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-07 18:28:48,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 18:28:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-07 18:28:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 18:28:48,123 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:48,123 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:48,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:48,324 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:48,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:48,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1656842535, now seen corresponding path program 15 times [2019-12-07 18:28:48,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:48,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238056616] [2019-12-07 18:28:48,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:48,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238056616] [2019-12-07 18:28:48,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865646427] [2019-12-07 18:28:48,441 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:48,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 18:28:48,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:48,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 18:28:48,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:48,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:48,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-07 18:28:48,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760591455] [2019-12-07 18:28:48,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 18:28:48,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:48,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 18:28:48,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-07 18:28:48,499 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 16 states. [2019-12-07 18:28:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:48,651 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-07 18:28:48,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 18:28:48,652 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-12-07 18:28:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:48,652 INFO L225 Difference]: With dead ends: 57 [2019-12-07 18:28:48,652 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 18:28:48,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2019-12-07 18:28:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 18:28:48,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-12-07 18:28:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 18:28:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 103 transitions. [2019-12-07 18:28:48,655 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 103 transitions. Word has length 20 [2019-12-07 18:28:48,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:48,655 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 103 transitions. [2019-12-07 18:28:48,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 18:28:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 103 transitions. [2019-12-07 18:28:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 18:28:48,655 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:48,655 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:48,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:48,856 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:48,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:48,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1656842783, now seen corresponding path program 16 times [2019-12-07 18:28:48,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:48,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91281715] [2019-12-07 18:28:48,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:48,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91281715] [2019-12-07 18:28:48,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863957850] [2019-12-07 18:28:48,944 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:48,976 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:28:48,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:48,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 18:28:48,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:48,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:48,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-07 18:28:48,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087579257] [2019-12-07 18:28:48,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 18:28:48,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:48,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 18:28:48,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:28:48,992 INFO L87 Difference]: Start difference. First operand 50 states and 103 transitions. Second operand 17 states. [2019-12-07 18:28:49,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:49,184 INFO L93 Difference]: Finished difference Result 59 states and 120 transitions. [2019-12-07 18:28:49,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 18:28:49,184 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-07 18:28:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:49,185 INFO L225 Difference]: With dead ends: 59 [2019-12-07 18:28:49,185 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 18:28:49,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2019-12-07 18:28:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 18:28:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-12-07 18:28:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 18:28:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 107 transitions. [2019-12-07 18:28:49,187 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 107 transitions. Word has length 20 [2019-12-07 18:28:49,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:49,187 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 107 transitions. [2019-12-07 18:28:49,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 18:28:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 107 transitions. [2019-12-07 18:28:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 18:28:49,188 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:49,188 INFO L410 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:49,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:49,389 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2015657298, now seen corresponding path program 17 times [2019-12-07 18:28:49,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:49,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275704794] [2019-12-07 18:28:49,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:49,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275704794] [2019-12-07 18:28:49,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751044162] [2019-12-07 18:28:49,547 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:49,606 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-07 18:28:49,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:49,607 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 18:28:49,608 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:49,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:49,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-07 18:28:49,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154549893] [2019-12-07 18:28:49,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 18:28:49,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:49,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 18:28:49,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-07 18:28:49,629 INFO L87 Difference]: Start difference. First operand 52 states and 107 transitions. Second operand 17 states. [2019-12-07 18:28:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:49,786 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-07 18:28:49,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 18:28:49,786 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2019-12-07 18:28:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:49,787 INFO L225 Difference]: With dead ends: 57 [2019-12-07 18:28:49,787 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 18:28:49,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2019-12-07 18:28:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 18:28:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2019-12-07 18:28:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 18:28:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-12-07 18:28:49,789 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 21 [2019-12-07 18:28:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:49,789 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-12-07 18:28:49,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 18:28:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-12-07 18:28:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 18:28:49,789 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:49,789 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:49,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:49,990 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:49,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:49,990 INFO L82 PathProgramCache]: Analyzing trace with hash -2015657050, now seen corresponding path program 18 times [2019-12-07 18:28:49,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:49,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612036757] [2019-12-07 18:28:49,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:50,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612036757] [2019-12-07 18:28:50,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435347060] [2019-12-07 18:28:50,111 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:50,147 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-07 18:28:50,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:50,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 18:28:50,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:50,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:50,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-07 18:28:50,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92147306] [2019-12-07 18:28:50,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 18:28:50,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:50,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 18:28:50,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-07 18:28:50,163 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 18 states. [2019-12-07 18:28:50,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:50,359 INFO L93 Difference]: Finished difference Result 59 states and 120 transitions. [2019-12-07 18:28:50,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 18:28:50,359 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-12-07 18:28:50,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:50,359 INFO L225 Difference]: With dead ends: 59 [2019-12-07 18:28:50,359 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 18:28:50,360 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=283, Invalid=647, Unknown=0, NotChecked=0, Total=930 [2019-12-07 18:28:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 18:28:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2019-12-07 18:28:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 18:28:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-07 18:28:50,361 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 21 [2019-12-07 18:28:50,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:50,361 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-07 18:28:50,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 18:28:50,362 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-07 18:28:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 18:28:50,362 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:50,362 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:50,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:50,563 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:50,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1206950281, now seen corresponding path program 19 times [2019-12-07 18:28:50,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:50,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731133289] [2019-12-07 18:28:50,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:50,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731133289] [2019-12-07 18:28:50,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041467694] [2019-12-07 18:28:50,680 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:50,720 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 18:28:50,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:50,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:50,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-07 18:28:50,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387344290] [2019-12-07 18:28:50,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 18:28:50,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:50,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 18:28:50,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2019-12-07 18:28:50,738 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 19 states. [2019-12-07 18:28:50,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:50,936 INFO L93 Difference]: Finished difference Result 61 states and 124 transitions. [2019-12-07 18:28:50,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 18:28:50,937 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-12-07 18:28:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:50,937 INFO L225 Difference]: With dead ends: 61 [2019-12-07 18:28:50,937 INFO L226 Difference]: Without dead ends: 55 [2019-12-07 18:28:50,937 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 18:28:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-07 18:28:50,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2019-12-07 18:28:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-07 18:28:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 76 transitions. [2019-12-07 18:28:50,939 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 76 transitions. Word has length 22 [2019-12-07 18:28:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:50,939 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 76 transitions. [2019-12-07 18:28:50,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 18:28:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 76 transitions. [2019-12-07 18:28:50,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 18:28:50,940 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:50,940 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:51,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:51,141 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash -16172482, now seen corresponding path program 20 times [2019-12-07 18:28:51,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:51,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623143462] [2019-12-07 18:28:51,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:51,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623143462] [2019-12-07 18:28:51,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238567857] [2019-12-07 18:28:51,317 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:51,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:28:51,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:51,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-07 18:28:51,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:51,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:51,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-07 18:28:51,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116527531] [2019-12-07 18:28:51,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 18:28:51,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:51,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 18:28:51,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2019-12-07 18:28:51,376 INFO L87 Difference]: Start difference. First operand 37 states and 76 transitions. Second operand 20 states. [2019-12-07 18:28:51,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:51,586 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-07 18:28:51,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 18:28:51,586 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-12-07 18:28:51,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:51,587 INFO L225 Difference]: With dead ends: 65 [2019-12-07 18:28:51,587 INFO L226 Difference]: Without dead ends: 61 [2019-12-07 18:28:51,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 18:28:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-07 18:28:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-12-07 18:28:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-07 18:28:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 119 transitions. [2019-12-07 18:28:51,589 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 119 transitions. Word has length 23 [2019-12-07 18:28:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:51,589 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 119 transitions. [2019-12-07 18:28:51,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 18:28:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 119 transitions. [2019-12-07 18:28:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 18:28:51,590 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:51,590 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:51,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:51,791 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:51,792 INFO L82 PathProgramCache]: Analyzing trace with hash -238048049, now seen corresponding path program 21 times [2019-12-07 18:28:51,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:51,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318564996] [2019-12-07 18:28:51,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:51,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318564996] [2019-12-07 18:28:51,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796885669] [2019-12-07 18:28:51,952 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:51,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-07 18:28:51,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:51,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 18:28:51,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:52,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:52,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-07 18:28:52,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610336592] [2019-12-07 18:28:52,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 18:28:52,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:52,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 18:28:52,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2019-12-07 18:28:52,006 INFO L87 Difference]: Start difference. First operand 58 states and 119 transitions. Second operand 21 states. [2019-12-07 18:28:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:52,240 INFO L93 Difference]: Finished difference Result 67 states and 136 transitions. [2019-12-07 18:28:52,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 18:28:52,240 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-12-07 18:28:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:52,241 INFO L225 Difference]: With dead ends: 67 [2019-12-07 18:28:52,241 INFO L226 Difference]: Without dead ends: 61 [2019-12-07 18:28:52,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=432, Invalid=974, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 18:28:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-07 18:28:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-12-07 18:28:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 18:28:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2019-12-07 18:28:52,243 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 24 [2019-12-07 18:28:52,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:52,243 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2019-12-07 18:28:52,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 18:28:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2019-12-07 18:28:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 18:28:52,244 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:52,244 INFO L410 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:52,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:52,445 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:52,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1638115806, now seen corresponding path program 22 times [2019-12-07 18:28:52,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:52,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346865924] [2019-12-07 18:28:52,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:52,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346865924] [2019-12-07 18:28:52,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64532231] [2019-12-07 18:28:52,593 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:52,629 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:28:52,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:52,629 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-07 18:28:52,630 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:52,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:52,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-07 18:28:52,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327930715] [2019-12-07 18:28:52,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 18:28:52,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:52,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 18:28:52,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2019-12-07 18:28:52,646 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand 21 states. [2019-12-07 18:28:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:52,894 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2019-12-07 18:28:52,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 18:28:52,894 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2019-12-07 18:28:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:52,895 INFO L225 Difference]: With dead ends: 70 [2019-12-07 18:28:52,895 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 18:28:52,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 18:28:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 18:28:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2019-12-07 18:28:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-07 18:28:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 125 transitions. [2019-12-07 18:28:52,897 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 125 transitions. Word has length 25 [2019-12-07 18:28:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:52,897 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 125 transitions. [2019-12-07 18:28:52,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 18:28:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 125 transitions. [2019-12-07 18:28:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 18:28:52,898 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:52,898 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:53,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:53,099 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash -758009821, now seen corresponding path program 23 times [2019-12-07 18:28:53,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:53,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142869898] [2019-12-07 18:28:53,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:53,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142869898] [2019-12-07 18:28:53,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908335754] [2019-12-07 18:28:53,270 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:53,311 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-07 18:28:53,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:53,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 18:28:53,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:53,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:53,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-07 18:28:53,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887785020] [2019-12-07 18:28:53,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 18:28:53,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:53,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 18:28:53,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2019-12-07 18:28:53,339 INFO L87 Difference]: Start difference. First operand 61 states and 125 transitions. Second operand 23 states. [2019-12-07 18:28:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:53,617 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2019-12-07 18:28:53,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 18:28:53,618 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-12-07 18:28:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:53,618 INFO L225 Difference]: With dead ends: 74 [2019-12-07 18:28:53,618 INFO L226 Difference]: Without dead ends: 65 [2019-12-07 18:28:53,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 18:28:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-07 18:28:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2019-12-07 18:28:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 18:28:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 84 transitions. [2019-12-07 18:28:53,620 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 84 transitions. Word has length 26 [2019-12-07 18:28:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:53,620 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 84 transitions. [2019-12-07 18:28:53,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 18:28:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 84 transitions. [2019-12-07 18:28:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 18:28:53,621 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:53,621 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:53,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:53,821 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:53,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:53,822 INFO L82 PathProgramCache]: Analyzing trace with hash -698357774, now seen corresponding path program 24 times [2019-12-07 18:28:53,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:53,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944202505] [2019-12-07 18:28:53,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:54,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944202505] [2019-12-07 18:28:54,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960806453] [2019-12-07 18:28:54,001 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:54,042 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-12-07 18:28:54,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:54,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 18:28:54,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:54,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:54,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-07 18:28:54,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34460019] [2019-12-07 18:28:54,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 18:28:54,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:54,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 18:28:54,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2019-12-07 18:28:54,066 INFO L87 Difference]: Start difference. First operand 41 states and 84 transitions. Second operand 24 states. [2019-12-07 18:28:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:54,414 INFO L93 Difference]: Finished difference Result 80 states and 162 transitions. [2019-12-07 18:28:54,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 18:28:54,414 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-12-07 18:28:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:54,415 INFO L225 Difference]: With dead ends: 80 [2019-12-07 18:28:54,415 INFO L226 Difference]: Without dead ends: 71 [2019-12-07 18:28:54,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=634, Invalid=1258, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 18:28:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-07 18:28:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 44. [2019-12-07 18:28:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 18:28:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-07 18:28:54,417 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 27 [2019-12-07 18:28:54,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:54,417 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-07 18:28:54,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 18:28:54,417 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-07 18:28:54,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 18:28:54,418 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:54,418 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:54,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:54,618 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:54,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:54,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1697011851, now seen corresponding path program 25 times [2019-12-07 18:28:54,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:54,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438971971] [2019-12-07 18:28:54,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:54,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438971971] [2019-12-07 18:28:54,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952857075] [2019-12-07 18:28:54,719 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:54,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 18:28:54,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:54,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:28:54,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2019-12-07 18:28:54,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115576313] [2019-12-07 18:28:54,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 18:28:54,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:54,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 18:28:54,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:28:54,765 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 13 states. [2019-12-07 18:28:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:54,785 INFO L93 Difference]: Finished difference Result 161 states and 296 transitions. [2019-12-07 18:28:54,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 18:28:54,785 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-12-07 18:28:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:54,785 INFO L225 Difference]: With dead ends: 161 [2019-12-07 18:28:54,785 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 18:28:54,785 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2019-12-07 18:28:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 18:28:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-12-07 18:28:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-07 18:28:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 70 transitions. [2019-12-07 18:28:54,787 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 70 transitions. Word has length 28 [2019-12-07 18:28:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:54,787 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 70 transitions. [2019-12-07 18:28:54,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 18:28:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 70 transitions. [2019-12-07 18:28:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 18:28:54,787 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:28:54,787 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 18:28:54,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:54,988 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:28:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:28:54,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1697012099, now seen corresponding path program 26 times [2019-12-07 18:28:54,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:28:54,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788082887] [2019-12-07 18:28:54,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:28:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:28:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:28:55,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788082887] [2019-12-07 18:28:55,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064051334] [2019-12-07 18:28:55,051 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/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 [2019-12-07 18:28:55,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:28:55,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:28:55,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 18:28:55,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:28:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 18:28:55,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 18:28:55,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 34 [2019-12-07 18:28:55,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74444169] [2019-12-07 18:28:55,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-07 18:28:55,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:28:55,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-07 18:28:55,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 18:28:55,321 INFO L87 Difference]: Start difference. First operand 43 states and 70 transitions. Second operand 34 states. [2019-12-07 18:28:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:28:56,890 INFO L93 Difference]: Finished difference Result 247 states and 335 transitions. [2019-12-07 18:28:56,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2019-12-07 18:28:56,890 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 28 [2019-12-07 18:28:56,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:28:56,890 INFO L225 Difference]: With dead ends: 247 [2019-12-07 18:28:56,890 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 18:28:56,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6825 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4671, Invalid=16209, Unknown=0, NotChecked=0, Total=20880 [2019-12-07 18:28:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 18:28:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 18:28:56,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 18:28:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 18:28:56,896 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2019-12-07 18:28:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:28:56,896 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 18:28:56,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-07 18:28:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 18:28:56,896 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 18:28:57,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:28:57,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:28:57 BasicIcfg [2019-12-07 18:28:57,101 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:28:57,101 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:28:57,102 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:28:57,102 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:28:57,102 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:28:40" (3/4) ... [2019-12-07 18:28:57,107 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 18:28:57,115 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-12-07 18:28:57,116 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-12-07 18:28:57,120 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-12-07 18:28:57,120 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 18:28:57,120 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 18:28:57,152 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bf57e757-baa0-49aa-8d2e-3822c323e597/bin/uautomizer/witness.graphml [2019-12-07 18:28:57,152 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:28:57,153 INFO L168 Benchmark]: Toolchain (without parser) took 17060.92 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 223.3 MB). Free memory was 939.4 MB in the beginning and 806.3 MB in the end (delta: 133.1 MB). Peak memory consumption was 356.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:28:57,153 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:28:57,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.0 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -120.8 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-12-07 18:28:57,154 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 18:28:57,154 INFO L168 Benchmark]: Boogie Preprocessor took 18.88 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:28:57,154 INFO L168 Benchmark]: RCFGBuilder took 239.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:28:57,154 INFO L168 Benchmark]: TraceAbstraction took 16363.83 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 136.3 MB). Free memory was 1.0 GB in the beginning and 809.3 MB in the end (delta: 216.4 MB). Peak memory consumption was 352.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:28:57,155 INFO L168 Benchmark]: Witness Printer took 50.43 ms. Allocated memory is still 1.3 GB. Free memory was 809.3 MB in the beginning and 806.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 11.5 GB. [2019-12-07 18:28:57,156 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 354.17 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 87.0 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -120.8 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.88 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 239.87 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 16363.83 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 136.3 MB). Free memory was 1.0 GB in the beginning and 809.3 MB in the end (delta: 216.4 MB). Peak memory consumption was 352.7 MB. Max. memory is 11.5 GB. * Witness Printer took 50.43 ms. Allocated memory is still 1.3 GB. Free memory was 809.3 MB in the beginning and 806.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.7s, 53 ProgramPointsBefore, 16 ProgramPointsAfterwards, 51 TransitionsBefore, 14 TransitionsAfterwards, 740 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 380 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 604 CheckedPairsTotal, 41 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 16.2s, OverallIterations: 28, TraceHistogramMax: 11, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 349 SDtfs, 953 SDslu, 1067 SDs, 0 SdLazy, 1500 SolverSat, 976 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1124 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 702 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9383 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 28 MinimizatonAttempts, 230 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 971 NumberOfCodeBlocks, 971 NumberOfCodeBlocksAsserted, 122 NumberOfCheckSat, 918 ConstructedInterpolants, 0 QuantifiedInterpolants, 56580 SizeOfPredicates, 248 NumberOfNonLiveVariables, 3200 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 53 InterpolantComputations, 4 PerfectInterpolantSequences, 293/1874 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...