./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-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_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 9b34aa4c2467f96ebe08cbccd6e971201d28a8fd .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 13:21:04,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:21:04,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:21:04,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:21:04,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:21:04,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:21:04,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:21:04,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:21:04,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:21:04,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:21:04,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:21:04,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:21:04,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:21:04,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:21:04,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:21:04,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:21:04,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:21:04,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:21:04,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:21:04,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:21:04,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:21:04,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:21:04,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:21:04,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:21:04,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:21:04,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:21:04,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:21:04,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:21:04,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:21:04,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:21:04,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:21:04,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:21:04,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:21:04,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:21:04,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:21:04,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:21:04,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:21:04,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:21:04,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:21:04,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:21:04,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:21:04,845 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 13:21:04,854 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:21:04,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:21:04,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 13:21:04,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 13:21:04,855 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 13:21:04,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:21:04,855 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:21:04,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:21:04,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:21:04,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:21:04,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:21:04,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:21:04,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:21:04,856 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:21:04,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:21:04,856 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:21:04,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:21:04,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:21:04,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 13:21:04,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:21:04,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:21:04,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:21:04,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:21:04,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:21:04,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:21:04,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 13:21:04,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:21:04,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:21:04,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:21:04,858 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_28648d9c-c201-48f1-bd08-db86006edaba/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 -> 9b34aa4c2467f96ebe08cbccd6e971201d28a8fd [2019-12-07 13:21:04,967 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:21:04,978 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:21:04,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:21:04,982 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:21:04,982 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:21:04,983 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longest-1.i [2019-12-07 13:21:05,031 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/data/5fe615861/4444660e968546639e353e6fcc15af8c/FLAG3415f99bc [2019-12-07 13:21:05,405 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:21:05,406 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/sv-benchmarks/c/pthread/triangular-longest-1.i [2019-12-07 13:21:05,415 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/data/5fe615861/4444660e968546639e353e6fcc15af8c/FLAG3415f99bc [2019-12-07 13:21:05,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/data/5fe615861/4444660e968546639e353e6fcc15af8c [2019-12-07 13:21:05,424 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:21:05,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:21:05,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:21:05,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:21:05,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:21:05,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:21:05" (1/1) ... [2019-12-07 13:21:05,430 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 01:21:05, skipping insertion in model container [2019-12-07 13:21:05,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:21:05" (1/1) ... [2019-12-07 13:21:05,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:21:05,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:21:05,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:21:05,701 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:21:05,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:21:05,774 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:21:05,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05 WrapperNode [2019-12-07 13:21:05,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:21:05,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:21:05,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:21:05,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:21:05,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05" (1/1) ... [2019-12-07 13:21:05,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05" (1/1) ... [2019-12-07 13:21:05,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:21:05,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:21:05,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:21:05,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:21:05,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05" (1/1) ... [2019-12-07 13:21:05,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05" (1/1) ... [2019-12-07 13:21:05,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05" (1/1) ... [2019-12-07 13:21:05,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05" (1/1) ... [2019-12-07 13:21:05,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05" (1/1) ... [2019-12-07 13:21:05,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05" (1/1) ... [2019-12-07 13:21:05,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05" (1/1) ... [2019-12-07 13:21:05,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:21:05,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:21:05,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:21:05,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:21:05,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:05,874 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-07 13:21:05,874 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-07 13:21:05,874 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-07 13:21:05,875 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-07 13:21:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 13:21:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-07 13:21:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 13:21:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 13:21:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-07 13:21:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:21:05,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:21:05,877 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 13:21:06,044 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:21:06,044 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 13:21:06,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:21:06 BoogieIcfgContainer [2019-12-07 13:21:06,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:21:06,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:21:06,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:21:06,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:21:06,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:21:05" (1/3) ... [2019-12-07 13:21:06,048 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 01:21:06, skipping insertion in model container [2019-12-07 13:21:06,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:21:05" (2/3) ... [2019-12-07 13:21:06,048 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 01:21:06, skipping insertion in model container [2019-12-07 13:21:06,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:21:06" (3/3) ... [2019-12-07 13:21:06,049 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2019-12-07 13:21:06,056 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-07 13:21:06,056 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:21:06,060 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:21:06,060 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-07 13:21:06,077 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,077 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,077 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,077 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,077 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,078 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,078 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,078 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,078 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,078 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,078 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,078 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,078 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,079 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,079 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,079 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,079 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,079 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,079 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,080 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,080 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,080 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,080 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,080 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,080 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,080 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,080 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,081 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 13:21:06,094 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-07 13:21:06,106 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:21:06,106 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:21:06,106 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:21:06,107 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:21:06,107 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:21:06,107 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:21:06,107 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:21:06,107 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:21:06,118 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-07 13:21:06,120 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-07 13:21:06,148 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-07 13:21:06,148 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 13:21:06,154 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 13:21:06,156 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-07 13:21:06,167 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-07 13:21:06,168 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 13:21:06,168 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 13:21:06,170 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-07 13:21:06,170 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-07 13:21:06,821 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-07 13:21:06,822 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-07 13:21:06,824 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-07 13:21:06,831 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-07 13:21:06,833 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-07 13:21:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 13:21:06,838 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:06,838 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 13:21:06,838 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:06,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:06,842 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-07 13:21:06,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:06,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538448826] [2019-12-07 13:21:06,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:07,005 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 13:21:07,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538448826] [2019-12-07 13:21:07,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:21:07,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 13:21:07,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631836362] [2019-12-07 13:21:07,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 13:21:07,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 13:21:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 13:21:07,025 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-07 13:21:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:07,047 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-07 13:21:07,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 13:21:07,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-07 13:21:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:07,056 INFO L225 Difference]: With dead ends: 48 [2019-12-07 13:21:07,056 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 13:21:07,057 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 13:21:07,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 13:21:07,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-07 13:21:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 13:21:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-07 13:21:07,082 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-07 13:21:07,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:07,082 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-07 13:21:07,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 13:21:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-07 13:21:07,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 13:21:07,083 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:07,083 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:07,083 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:07,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:07,083 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-07 13:21:07,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:07,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420754936] [2019-12-07 13:21:07,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:07,141 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 13:21:07,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420754936] [2019-12-07 13:21:07,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:21:07,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 13:21:07,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452892029] [2019-12-07 13:21:07,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 13:21:07,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:07,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 13:21:07,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 13:21:07,144 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-07 13:21:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:07,166 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-07 13:21:07,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 13:21:07,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 13:21:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:07,168 INFO L225 Difference]: With dead ends: 38 [2019-12-07 13:21:07,168 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 13:21:07,168 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 13:21:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 13:21:07,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-07 13:21:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 13:21:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-07 13:21:07,172 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 7 [2019-12-07 13:21:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:07,172 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-07 13:21:07,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 13:21:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-07 13:21:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 13:21:07,173 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:07,173 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:07,173 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 1 times [2019-12-07 13:21:07,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:07,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426517715] [2019-12-07 13:21:07,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:07,228 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 13:21:07,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426517715] [2019-12-07 13:21:07,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:21:07,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 13:21:07,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200049395] [2019-12-07 13:21:07,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:21:07,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:21:07,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:21:07,230 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-07 13:21:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:07,273 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-07 13:21:07,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:21:07,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 13:21:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:07,274 INFO L225 Difference]: With dead ends: 36 [2019-12-07 13:21:07,274 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 13:21:07,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:21:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 13:21:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-12-07 13:21:07,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 13:21:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-07 13:21:07,279 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 9 [2019-12-07 13:21:07,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:07,280 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-07 13:21:07,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:21:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-07 13:21:07,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 13:21:07,280 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:07,281 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:07,281 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:07,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 2 times [2019-12-07 13:21:07,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:07,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61680471] [2019-12-07 13:21:07,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:07,341 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 13:21:07,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61680471] [2019-12-07 13:21:07,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755348007] [2019-12-07 13:21:07,341 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:07,380 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:21:07,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:07,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 13:21:07,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:07,402 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 13:21:07,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:07,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-07 13:21:07,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677653875] [2019-12-07 13:21:07,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 13:21:07,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:07,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 13:21:07,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-12-07 13:21:07,404 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 7 states. [2019-12-07 13:21:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:07,437 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-07 13:21:07,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:21:07,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-07 13:21:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:07,438 INFO L225 Difference]: With dead ends: 37 [2019-12-07 13:21:07,438 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 13:21:07,439 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-12-07 13:21:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 13:21:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-07 13:21:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 13:21:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-07 13:21:07,442 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 10 [2019-12-07 13:21:07,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:07,442 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-07 13:21:07,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 13:21:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-07 13:21:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 13:21:07,442 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:07,443 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:07,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:07,644 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:07,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 3 times [2019-12-07 13:21:07,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:07,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499494290] [2019-12-07 13:21:07,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:07,782 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 13:21:07,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499494290] [2019-12-07 13:21:07,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390391349] [2019-12-07 13:21:07,783 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:07,821 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 13:21:07,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:07,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 13:21:07,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:07,834 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 13:21:07,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:07,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-07 13:21:07,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479427914] [2019-12-07 13:21:07,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 13:21:07,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 13:21:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:21:07,836 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 8 states. [2019-12-07 13:21:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:07,893 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-07 13:21:07,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 13:21:07,894 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-07 13:21:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:07,894 INFO L225 Difference]: With dead ends: 40 [2019-12-07 13:21:07,894 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 13:21:07,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 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 13:21:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 13:21:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-12-07 13:21:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 13:21:07,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 71 transitions. [2019-12-07 13:21:07,898 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 71 transitions. Word has length 11 [2019-12-07 13:21:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:07,898 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 71 transitions. [2019-12-07 13:21:07,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 13:21:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 71 transitions. [2019-12-07 13:21:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 13:21:07,899 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:07,899 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:08,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:08,101 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:08,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:08,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 4 times [2019-12-07 13:21:08,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:08,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703809056] [2019-12-07 13:21:08,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:08,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703809056] [2019-12-07 13:21:08,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479049006] [2019-12-07 13:21:08,216 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:08,251 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:21:08,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:08,252 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 13:21:08,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:08,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:08,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 13:21:08,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951816] [2019-12-07 13:21:08,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 13:21:08,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:08,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 13:21:08,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 13:21:08,264 INFO L87 Difference]: Start difference. First operand 34 states and 71 transitions. Second operand 9 states. [2019-12-07 13:21:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:08,321 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-07 13:21:08,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 13:21:08,321 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-07 13:21:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:08,322 INFO L225 Difference]: With dead ends: 43 [2019-12-07 13:21:08,322 INFO L226 Difference]: Without dead ends: 39 [2019-12-07 13:21:08,322 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 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 13:21:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-07 13:21:08,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-07 13:21:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 13:21:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-07 13:21:08,325 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 12 [2019-12-07 13:21:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:08,325 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-07 13:21:08,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 13:21:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-07 13:21:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 13:21:08,326 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:08,326 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:08,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:08,526 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:08,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 5 times [2019-12-07 13:21:08,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:08,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148889377] [2019-12-07 13:21:08,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:08,584 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 13:21:08,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148889377] [2019-12-07 13:21:08,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250523035] [2019-12-07 13:21:08,585 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:08,617 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-07 13:21:08,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:08,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 13:21:08,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:08,635 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 13:21:08,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:08,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-07 13:21:08,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922697144] [2019-12-07 13:21:08,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:21:08,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:08,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:21:08,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-12-07 13:21:08,636 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 10 states. [2019-12-07 13:21:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:08,726 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2019-12-07 13:21:08,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 13:21:08,727 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-07 13:21:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:08,727 INFO L225 Difference]: With dead ends: 52 [2019-12-07 13:21:08,727 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 13:21:08,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-07 13:21:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 13:21:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2019-12-07 13:21:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 13:21:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-07 13:21:08,731 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 13 [2019-12-07 13:21:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:08,731 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-07 13:21:08,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:21:08,731 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-07 13:21:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 13:21:08,732 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:08,732 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:08,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:08,933 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:08,934 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 6 times [2019-12-07 13:21:08,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:08,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846601753] [2019-12-07 13:21:08,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:09,127 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 13:21:09,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846601753] [2019-12-07 13:21:09,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028384851] [2019-12-07 13:21:09,128 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:09,192 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-07 13:21:09,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:09,193 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 13:21:09,194 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:09,217 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 13:21:09,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:09,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-07 13:21:09,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111726140] [2019-12-07 13:21:09,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 13:21:09,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:09,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 13:21:09,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-12-07 13:21:09,219 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 11 states. [2019-12-07 13:21:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:09,347 INFO L93 Difference]: Finished difference Result 53 states and 108 transitions. [2019-12-07 13:21:09,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 13:21:09,347 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-07 13:21:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:09,348 INFO L225 Difference]: With dead ends: 53 [2019-12-07 13:21:09,348 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 13:21:09,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-07 13:21:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 13:21:09,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2019-12-07 13:21:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 13:21:09,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-07 13:21:09,351 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 14 [2019-12-07 13:21:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:09,352 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-07 13:21:09,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 13:21:09,352 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-07 13:21:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 13:21:09,352 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:09,352 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:09,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:09,554 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:09,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 7 times [2019-12-07 13:21:09,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:09,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066628001] [2019-12-07 13:21:09,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:09,664 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 13:21:09,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066628001] [2019-12-07 13:21:09,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770797557] [2019-12-07 13:21:09,665 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:09,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 13:21:09,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:09,710 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 13:21:09,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:09,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-07 13:21:09,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361722389] [2019-12-07 13:21:09,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 13:21:09,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:09,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 13:21:09,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-07 13:21:09,711 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 12 states. [2019-12-07 13:21:09,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:09,809 INFO L93 Difference]: Finished difference Result 56 states and 114 transitions. [2019-12-07 13:21:09,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 13:21:09,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-07 13:21:09,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:09,810 INFO L225 Difference]: With dead ends: 56 [2019-12-07 13:21:09,810 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 13:21:09,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2019-12-07 13:21:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 13:21:09,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2019-12-07 13:21:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 13:21:09,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-07 13:21:09,814 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 15 [2019-12-07 13:21:09,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:09,814 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-07 13:21:09,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 13:21:09,814 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-07 13:21:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 13:21:09,814 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:09,814 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:10,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:10,016 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:10,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:10,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 8 times [2019-12-07 13:21:10,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:10,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746960224] [2019-12-07 13:21:10,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:10,122 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 13:21:10,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746960224] [2019-12-07 13:21:10,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648095662] [2019-12-07 13:21:10,123 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:10,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:21:10,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:10,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 13:21:10,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:10,168 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 13:21:10,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:10,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-07 13:21:10,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535910315] [2019-12-07 13:21:10,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 13:21:10,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:10,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 13:21:10,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-12-07 13:21:10,170 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 13 states. [2019-12-07 13:21:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:10,274 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-07 13:21:10,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 13:21:10,274 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-07 13:21:10,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:10,274 INFO L225 Difference]: With dead ends: 57 [2019-12-07 13:21:10,274 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 13:21:10,275 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 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 13:21:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 13:21:10,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2019-12-07 13:21:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 13:21:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-07 13:21:10,277 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 16 [2019-12-07 13:21:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:10,277 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-07 13:21:10,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 13:21:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-07 13:21:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 13:21:10,278 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:10,278 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:10,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:10,479 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:10,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:10,480 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 9 times [2019-12-07 13:21:10,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:10,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353343701] [2019-12-07 13:21:10,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:10,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353343701] [2019-12-07 13:21:10,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494738474] [2019-12-07 13:21:10,671 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:10,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 13:21:10,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:10,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 13:21:10,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:10,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:10,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-07 13:21:10,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586816638] [2019-12-07 13:21:10,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 13:21:10,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:10,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 13:21:10,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-07 13:21:10,723 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 14 states. [2019-12-07 13:21:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:10,848 INFO L93 Difference]: Finished difference Result 51 states and 104 transitions. [2019-12-07 13:21:10,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 13:21:10,848 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-07 13:21:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:10,849 INFO L225 Difference]: With dead ends: 51 [2019-12-07 13:21:10,849 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 13:21:10,849 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-12-07 13:21:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 13:21:10,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2019-12-07 13:21:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 13:21:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-07 13:21:10,852 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 17 [2019-12-07 13:21:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:10,852 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-07 13:21:10,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 13:21:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-07 13:21:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 13:21:10,852 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:10,852 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:11,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:11,054 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:11,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:11,054 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 10 times [2019-12-07 13:21:11,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:11,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947982867] [2019-12-07 13:21:11,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:11,181 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 13:21:11,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947982867] [2019-12-07 13:21:11,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121911810] [2019-12-07 13:21:11,182 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:11,219 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:21:11,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:11,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 13:21:11,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:11,236 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 13:21:11,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:11,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-07 13:21:11,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821505177] [2019-12-07 13:21:11,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 13:21:11,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:11,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 13:21:11,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-12-07 13:21:11,238 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 15 states. [2019-12-07 13:21:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:11,389 INFO L93 Difference]: Finished difference Result 53 states and 108 transitions. [2019-12-07 13:21:11,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 13:21:11,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-07 13:21:11,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:11,390 INFO L225 Difference]: With dead ends: 53 [2019-12-07 13:21:11,390 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 13:21:11,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2019-12-07 13:21:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 13:21:11,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2019-12-07 13:21:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 13:21:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-12-07 13:21:11,393 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 18 [2019-12-07 13:21:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:11,393 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-12-07 13:21:11,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 13:21:11,393 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-12-07 13:21:11,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 13:21:11,394 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:11,394 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:11,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:11,595 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1609121454, now seen corresponding path program 11 times [2019-12-07 13:21:11,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:11,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517460896] [2019-12-07 13:21:11,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:11,692 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 13:21:11,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517460896] [2019-12-07 13:21:11,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501895815] [2019-12-07 13:21:11,693 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:11,729 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 13:21:11,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:11,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 13:21:11,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:11,746 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 13:21:11,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:11,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-07 13:21:11,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077244601] [2019-12-07 13:21:11,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 13:21:11,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:11,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 13:21:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-07 13:21:11,747 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 16 states. [2019-12-07 13:21:11,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:11,901 INFO L93 Difference]: Finished difference Result 55 states and 112 transitions. [2019-12-07 13:21:11,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 13:21:11,902 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-07 13:21:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:11,902 INFO L225 Difference]: With dead ends: 55 [2019-12-07 13:21:11,902 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 13:21:11,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2019-12-07 13:21:11,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 13:21:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2019-12-07 13:21:11,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 13:21:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-07 13:21:11,905 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 19 [2019-12-07 13:21:11,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:11,905 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-07 13:21:11,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 13:21:11,905 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-07 13:21:11,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 13:21:11,906 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:11,906 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:12,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:12,107 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:12,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:12,108 INFO L82 PathProgramCache]: Analyzing trace with hash -65021205, now seen corresponding path program 12 times [2019-12-07 13:21:12,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:12,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74401645] [2019-12-07 13:21:12,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:12,231 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 13:21:12,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74401645] [2019-12-07 13:21:12,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020340803] [2019-12-07 13:21:12,231 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:12,267 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-07 13:21:12,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:12,268 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 13:21:12,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:12,282 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 13:21:12,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:12,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-07 13:21:12,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906984612] [2019-12-07 13:21:12,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 13:21:12,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:12,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 13:21:12,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2019-12-07 13:21:12,284 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 17 states. [2019-12-07 13:21:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:12,460 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-07 13:21:12,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 13:21:12,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-07 13:21:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:12,461 INFO L225 Difference]: With dead ends: 57 [2019-12-07 13:21:12,461 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 13:21:12,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2019-12-07 13:21:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 13:21:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2019-12-07 13:21:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 13:21:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 68 transitions. [2019-12-07 13:21:12,464 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 68 transitions. Word has length 20 [2019-12-07 13:21:12,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:12,465 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 68 transitions. [2019-12-07 13:21:12,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 13:21:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 68 transitions. [2019-12-07 13:21:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 13:21:12,465 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:12,466 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:12,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:12,667 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:12,667 INFO L82 PathProgramCache]: Analyzing trace with hash -177481222, now seen corresponding path program 13 times [2019-12-07 13:21:12,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:12,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144507529] [2019-12-07 13:21:12,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:12,798 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 13:21:12,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144507529] [2019-12-07 13:21:12,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267013722] [2019-12-07 13:21:12,799 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:12,830 INFO L264 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 13:21:12,831 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:12,848 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 13:21:12,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:12,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-07 13:21:12,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549811619] [2019-12-07 13:21:12,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 13:21:12,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:12,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 13:21:12,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-07 13:21:12,849 INFO L87 Difference]: Start difference. First operand 33 states and 68 transitions. Second operand 18 states. [2019-12-07 13:21:13,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:13,035 INFO L93 Difference]: Finished difference Result 60 states and 122 transitions. [2019-12-07 13:21:13,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 13:21:13,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-12-07 13:21:13,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:13,036 INFO L225 Difference]: With dead ends: 60 [2019-12-07 13:21:13,036 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 13:21:13,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=340, Invalid=652, Unknown=0, NotChecked=0, Total=992 [2019-12-07 13:21:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 13:21:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2019-12-07 13:21:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 13:21:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 111 transitions. [2019-12-07 13:21:13,039 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 111 transitions. Word has length 21 [2019-12-07 13:21:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:13,039 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 111 transitions. [2019-12-07 13:21:13,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 13:21:13,040 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 111 transitions. [2019-12-07 13:21:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 13:21:13,040 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:13,040 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:13,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:13,241 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1939140947, now seen corresponding path program 14 times [2019-12-07 13:21:13,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:13,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356890615] [2019-12-07 13:21:13,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:13,361 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 13:21:13,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356890615] [2019-12-07 13:21:13,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29235499] [2019-12-07 13:21:13,362 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:13,395 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:21:13,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:13,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 13:21:13,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:13,411 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 13:21:13,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:13,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-07 13:21:13,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423724886] [2019-12-07 13:21:13,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 13:21:13,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:13,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 13:21:13,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2019-12-07 13:21:13,413 INFO L87 Difference]: Start difference. First operand 54 states and 111 transitions. Second operand 19 states. [2019-12-07 13:21:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:13,623 INFO L93 Difference]: Finished difference Result 63 states and 128 transitions. [2019-12-07 13:21:13,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 13:21:13,623 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-12-07 13:21:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:13,624 INFO L225 Difference]: With dead ends: 63 [2019-12-07 13:21:13,624 INFO L226 Difference]: Without dead ends: 55 [2019-12-07 13:21:13,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 13:21:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-07 13:21:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2019-12-07 13:21:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-07 13:21:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-12-07 13:21:13,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 22 [2019-12-07 13:21:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:13,627 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-12-07 13:21:13,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 13:21:13,627 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-12-07 13:21:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 13:21:13,627 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:13,627 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:13,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:13,828 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1239247010, now seen corresponding path program 15 times [2019-12-07 13:21:13,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:13,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973070375] [2019-12-07 13:21:13,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:13,981 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 13:21:13,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973070375] [2019-12-07 13:21:13,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589832059] [2019-12-07 13:21:13,981 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:14,020 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-07 13:21:14,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:14,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-07 13:21:14,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:14,040 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 13:21:14,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:14,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-07 13:21:14,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776520216] [2019-12-07 13:21:14,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 13:21:14,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:14,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 13:21:14,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2019-12-07 13:21:14,041 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 20 states. [2019-12-07 13:21:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:14,276 INFO L93 Difference]: Finished difference Result 63 states and 128 transitions. [2019-12-07 13:21:14,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 13:21:14,277 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-12-07 13:21:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:14,277 INFO L225 Difference]: With dead ends: 63 [2019-12-07 13:21:14,277 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 13:21:14,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=385, Invalid=875, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 13:21:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 13:21:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2019-12-07 13:21:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 13:21:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-07 13:21:14,280 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 23 [2019-12-07 13:21:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:14,280 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-07 13:21:14,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 13:21:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-07 13:21:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 13:21:14,280 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:14,281 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:14,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:14,481 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash -501346885, now seen corresponding path program 16 times [2019-12-07 13:21:14,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:14,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863726714] [2019-12-07 13:21:14,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:14,609 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 13:21:14,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863726714] [2019-12-07 13:21:14,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627472577] [2019-12-07 13:21:14,609 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:14,645 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:21:14,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:14,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-07 13:21:14,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:14,666 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 13:21:14,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:14,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-07 13:21:14,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219239914] [2019-12-07 13:21:14,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 13:21:14,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:14,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 13:21:14,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2019-12-07 13:21:14,667 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 21 states. [2019-12-07 13:21:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:14,905 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-07 13:21:14,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 13:21:14,905 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-12-07 13:21:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:14,906 INFO L225 Difference]: With dead ends: 65 [2019-12-07 13:21:14,906 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 13:21:14,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 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 13:21:14,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 13:21:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2019-12-07 13:21:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-07 13:21:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 76 transitions. [2019-12-07 13:21:14,908 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 76 transitions. Word has length 24 [2019-12-07 13:21:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:14,908 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 76 transitions. [2019-12-07 13:21:14,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 13:21:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 76 transitions. [2019-12-07 13:21:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 13:21:14,909 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:14,909 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:15,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:15,110 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:15,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1210445130, now seen corresponding path program 17 times [2019-12-07 13:21:15,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:15,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557836443] [2019-12-07 13:21:15,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:15,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557836443] [2019-12-07 13:21:15,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146797594] [2019-12-07 13:21:15,278 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:15,314 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-12-07 13:21:15,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:15,315 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 13:21:15,316 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:15,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:15,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-07 13:21:15,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387905047] [2019-12-07 13:21:15,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-07 13:21:15,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:15,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-07 13:21:15,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2019-12-07 13:21:15,334 INFO L87 Difference]: Start difference. First operand 37 states and 76 transitions. Second operand 22 states. [2019-12-07 13:21:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:15,592 INFO L93 Difference]: Finished difference Result 67 states and 136 transitions. [2019-12-07 13:21:15,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 13:21:15,593 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-12-07 13:21:15,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:15,593 INFO L225 Difference]: With dead ends: 67 [2019-12-07 13:21:15,593 INFO L226 Difference]: Without dead ends: 61 [2019-12-07 13:21:15,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=526, Invalid=1034, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 13:21:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-07 13:21:15,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 40. [2019-12-07 13:21:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 13:21:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-07 13:21:15,595 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 25 [2019-12-07 13:21:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:15,595 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-07 13:21:15,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-07 13:21:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-07 13:21:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-07 13:21:15,596 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:15,596 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:15,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:15,797 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:15,798 INFO L82 PathProgramCache]: Analyzing trace with hash -758009821, now seen corresponding path program 18 times [2019-12-07 13:21:15,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:15,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248352188] [2019-12-07 13:21:15,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:15,965 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 13:21:15,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248352188] [2019-12-07 13:21:15,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37738327] [2019-12-07 13:21:15,965 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:16,008 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-12-07 13:21:16,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:16,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 13:21:16,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:16,029 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 13:21:16,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:16,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-07 13:21:16,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093952062] [2019-12-07 13:21:16,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 13:21:16,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:16,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 13:21:16,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2019-12-07 13:21:16,031 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 23 states. [2019-12-07 13:21:16,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:16,308 INFO L93 Difference]: Finished difference Result 69 states and 140 transitions. [2019-12-07 13:21:16,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 13:21:16,308 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-12-07 13:21:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:16,309 INFO L225 Difference]: With dead ends: 69 [2019-12-07 13:21:16,309 INFO L226 Difference]: Without dead ends: 63 [2019-12-07 13:21:16,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=527, Invalid=1195, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 13:21:16,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-07 13:21:16,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2019-12-07 13:21:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-07 13:21:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 80 transitions. [2019-12-07 13:21:16,311 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 80 transitions. Word has length 26 [2019-12-07 13:21:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:16,311 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 80 transitions. [2019-12-07 13:21:16,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 13:21:16,312 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 80 transitions. [2019-12-07 13:21:16,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 13:21:16,312 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:16,312 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:16,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:16,513 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:16,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:16,514 INFO L82 PathProgramCache]: Analyzing trace with hash -698357774, now seen corresponding path program 19 times [2019-12-07 13:21:16,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:16,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208878167] [2019-12-07 13:21:16,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:16,701 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 13:21:16,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208878167] [2019-12-07 13:21:16,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779364855] [2019-12-07 13:21:16,702 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:16,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 13:21:16,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:16,752 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 13:21:16,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:16,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-07 13:21:16,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633399043] [2019-12-07 13:21:16,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 13:21:16,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:16,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 13:21:16,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2019-12-07 13:21:16,753 INFO L87 Difference]: Start difference. First operand 39 states and 80 transitions. Second operand 24 states. [2019-12-07 13:21:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:17,047 INFO L93 Difference]: Finished difference Result 72 states and 146 transitions. [2019-12-07 13:21:17,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 13:21:17,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-12-07 13:21:17,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:17,048 INFO L225 Difference]: With dead ends: 72 [2019-12-07 13:21:17,048 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 13:21:17,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=634, Invalid=1258, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 13:21:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 13:21:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-12-07 13:21:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 13:21:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 135 transitions. [2019-12-07 13:21:17,051 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 135 transitions. Word has length 27 [2019-12-07 13:21:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:17,051 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 135 transitions. [2019-12-07 13:21:17,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 13:21:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 135 transitions. [2019-12-07 13:21:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 13:21:17,052 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:17,052 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:17,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:17,253 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:17,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1697011851, now seen corresponding path program 20 times [2019-12-07 13:21:17,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:17,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398219243] [2019-12-07 13:21:17,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:17,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398219243] [2019-12-07 13:21:17,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622515126] [2019-12-07 13:21:17,449 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:17,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:21:17,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:17,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 13:21:17,485 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:17,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:17,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-07 13:21:17,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675297870] [2019-12-07 13:21:17,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 13:21:17,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:17,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 13:21:17,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-12-07 13:21:17,506 INFO L87 Difference]: Start difference. First operand 66 states and 135 transitions. Second operand 25 states. [2019-12-07 13:21:17,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:17,830 INFO L93 Difference]: Finished difference Result 75 states and 152 transitions. [2019-12-07 13:21:17,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 13:21:17,830 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2019-12-07 13:21:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:17,830 INFO L225 Difference]: With dead ends: 75 [2019-12-07 13:21:17,830 INFO L226 Difference]: Without dead ends: 67 [2019-12-07 13:21:17,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=649, Invalid=1331, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 13:21:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-07 13:21:17,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2019-12-07 13:21:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 13:21:17,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 84 transitions. [2019-12-07 13:21:17,833 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 84 transitions. Word has length 28 [2019-12-07 13:21:17,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:17,833 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 84 transitions. [2019-12-07 13:21:17,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 13:21:17,833 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 84 transitions. [2019-12-07 13:21:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 13:21:17,833 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:17,833 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:18,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:18,034 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:18,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1106913126, now seen corresponding path program 21 times [2019-12-07 13:21:18,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:18,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650694030] [2019-12-07 13:21:18,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:18,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650694030] [2019-12-07 13:21:18,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620150178] [2019-12-07 13:21:18,240 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:18,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-12-07 13:21:18,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:18,281 INFO L264 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 13:21:18,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:18,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:18,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-07 13:21:18,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461643159] [2019-12-07 13:21:18,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 13:21:18,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:18,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 13:21:18,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2019-12-07 13:21:18,301 INFO L87 Difference]: Start difference. First operand 41 states and 84 transitions. Second operand 26 states. [2019-12-07 13:21:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:18,632 INFO L93 Difference]: Finished difference Result 75 states and 152 transitions. [2019-12-07 13:21:18,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 13:21:18,633 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2019-12-07 13:21:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:18,633 INFO L225 Difference]: With dead ends: 75 [2019-12-07 13:21:18,633 INFO L226 Difference]: Without dead ends: 69 [2019-12-07 13:21:18,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=676, Invalid=1580, Unknown=0, NotChecked=0, Total=2256 [2019-12-07 13:21:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-07 13:21:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 44. [2019-12-07 13:21:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 13:21:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-07 13:21:18,635 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 29 [2019-12-07 13:21:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:18,635 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-07 13:21:18,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 13:21:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-07 13:21:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 13:21:18,636 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:18,636 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:18,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:18,837 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:18,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1259174157, now seen corresponding path program 22 times [2019-12-07 13:21:18,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:18,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843397796] [2019-12-07 13:21:18,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:19,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843397796] [2019-12-07 13:21:19,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25110912] [2019-12-07 13:21:19,062 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:19,101 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:21:19,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:19,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 13:21:19,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:19,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:19,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-07 13:21:19,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254511189] [2019-12-07 13:21:19,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-07 13:21:19,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-07 13:21:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-12-07 13:21:19,126 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 27 states. [2019-12-07 13:21:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:19,506 INFO L93 Difference]: Finished difference Result 79 states and 160 transitions. [2019-12-07 13:21:19,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 13:21:19,506 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2019-12-07 13:21:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:19,507 INFO L225 Difference]: With dead ends: 79 [2019-12-07 13:21:19,507 INFO L226 Difference]: Without dead ends: 75 [2019-12-07 13:21:19,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=768, Invalid=1584, Unknown=0, NotChecked=0, Total=2352 [2019-12-07 13:21:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-07 13:21:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2019-12-07 13:21:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-07 13:21:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 147 transitions. [2019-12-07 13:21:19,509 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 147 transitions. Word has length 30 [2019-12-07 13:21:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:19,509 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 147 transitions. [2019-12-07 13:21:19,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-07 13:21:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 147 transitions. [2019-12-07 13:21:19,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 13:21:19,510 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:19,510 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:19,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:19,711 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:19,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1408384834, now seen corresponding path program 23 times [2019-12-07 13:21:19,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:19,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561333196] [2019-12-07 13:21:19,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:19,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561333196] [2019-12-07 13:21:19,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167767473] [2019-12-07 13:21:19,944 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:19,982 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-07 13:21:19,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:19,983 INFO L264 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 13:21:19,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:20,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:20,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-07 13:21:20,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300998395] [2019-12-07 13:21:20,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 13:21:20,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:20,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 13:21:20,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2019-12-07 13:21:20,016 INFO L87 Difference]: Start difference. First operand 72 states and 147 transitions. Second operand 28 states. [2019-12-07 13:21:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:20,400 INFO L93 Difference]: Finished difference Result 82 states and 166 transitions. [2019-12-07 13:21:20,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 13:21:20,400 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2019-12-07 13:21:20,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:20,401 INFO L225 Difference]: With dead ends: 82 [2019-12-07 13:21:20,401 INFO L226 Difference]: Without dead ends: 78 [2019-12-07 13:21:20,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=1772, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 13:21:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-07 13:21:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2019-12-07 13:21:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-07 13:21:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-07 13:21:20,403 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 31 [2019-12-07 13:21:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:20,403 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-07 13:21:20,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 13:21:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-07 13:21:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-07 13:21:20,404 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:20,404 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:20,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:20,605 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1114422107, now seen corresponding path program 24 times [2019-12-07 13:21:20,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:20,606 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599255709] [2019-12-07 13:21:20,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:20,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599255709] [2019-12-07 13:21:20,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462451717] [2019-12-07 13:21:20,815 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:20,859 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-07 13:21:20,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:20,860 INFO L264 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 13:21:20,860 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:20,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:20,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-07 13:21:20,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299049718] [2019-12-07 13:21:20,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 13:21:20,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:20,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 13:21:20,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2019-12-07 13:21:20,881 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 29 states. [2019-12-07 13:21:21,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:21,279 INFO L93 Difference]: Finished difference Result 89 states and 180 transitions. [2019-12-07 13:21:21,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-07 13:21:21,279 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2019-12-07 13:21:21,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:21,280 INFO L225 Difference]: With dead ends: 89 [2019-12-07 13:21:21,280 INFO L226 Difference]: Without dead ends: 76 [2019-12-07 13:21:21,281 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2002, Unknown=0, NotChecked=0, Total=2862 [2019-12-07 13:21:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-07 13:21:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2019-12-07 13:21:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 13:21:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 92 transitions. [2019-12-07 13:21:21,282 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 92 transitions. Word has length 32 [2019-12-07 13:21:21,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:21,282 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 92 transitions. [2019-12-07 13:21:21,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 13:21:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 92 transitions. [2019-12-07 13:21:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-07 13:21:21,283 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:21,283 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:21,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:21,484 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:21,484 INFO L82 PathProgramCache]: Analyzing trace with hash 543136746, now seen corresponding path program 25 times [2019-12-07 13:21:21,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:21,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156872033] [2019-12-07 13:21:21,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:21,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156872033] [2019-12-07 13:21:21,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576074031] [2019-12-07 13:21:21,741 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:21,781 INFO L264 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 13:21:21,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:21,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:21,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-07 13:21:21,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800030841] [2019-12-07 13:21:21,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-07 13:21:21,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:21,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-07 13:21:21,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2019-12-07 13:21:21,803 INFO L87 Difference]: Start difference. First operand 45 states and 92 transitions. Second operand 30 states. [2019-12-07 13:21:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:22,242 INFO L93 Difference]: Finished difference Result 84 states and 170 transitions. [2019-12-07 13:21:22,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-07 13:21:22,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2019-12-07 13:21:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:22,243 INFO L225 Difference]: With dead ends: 84 [2019-12-07 13:21:22,243 INFO L226 Difference]: Without dead ends: 80 [2019-12-07 13:21:22,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1018, Invalid=2062, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 13:21:22,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-07 13:21:22,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-12-07 13:21:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-07 13:21:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2019-12-07 13:21:22,246 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 33 [2019-12-07 13:21:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:22,246 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2019-12-07 13:21:22,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-07 13:21:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2019-12-07 13:21:22,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 13:21:22,247 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:22,247 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:22,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:22,448 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:22,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1512797635, now seen corresponding path program 26 times [2019-12-07 13:21:22,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:22,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129747870] [2019-12-07 13:21:22,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:22,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129747870] [2019-12-07 13:21:22,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855846903] [2019-12-07 13:21:22,726 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/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 13:21:22,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:21:22,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:22,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-07 13:21:22,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:22,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:22,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-07 13:21:22,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904892464] [2019-12-07 13:21:22,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-07 13:21:22,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:22,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-07 13:21:22,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2019-12-07 13:21:22,784 INFO L87 Difference]: Start difference. First operand 78 states and 159 transitions. Second operand 31 states. [2019-12-07 13:21:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:23,285 INFO L93 Difference]: Finished difference Result 87 states and 176 transitions. [2019-12-07 13:21:23,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-07 13:21:23,285 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2019-12-07 13:21:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:23,286 INFO L225 Difference]: With dead ends: 87 [2019-12-07 13:21:23,286 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 13:21:23,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1036, Invalid=2156, Unknown=0, NotChecked=0, Total=3192 [2019-12-07 13:21:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 13:21:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2019-12-07 13:21:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-07 13:21:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 100 transitions. [2019-12-07 13:21:23,289 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 100 transitions. Word has length 34 [2019-12-07 13:21:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:23,289 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 100 transitions. [2019-12-07 13:21:23,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-07 13:21:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 100 transitions. [2019-12-07 13:21:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 13:21:23,290 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:23,290 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:23,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:23,491 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2031587694, now seen corresponding path program 27 times [2019-12-07 13:21:23,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:23,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604545523] [2019-12-07 13:21:23,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:23,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604545523] [2019-12-07 13:21:23,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421387056] [2019-12-07 13:21:23,740 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:23,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-12-07 13:21:23,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:23,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 13:21:23,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:23,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:23,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-07 13:21:23,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962956611] [2019-12-07 13:21:23,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-07 13:21:23,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:23,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-07 13:21:23,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2019-12-07 13:21:23,812 INFO L87 Difference]: Start difference. First operand 49 states and 100 transitions. Second operand 32 states. [2019-12-07 13:21:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:24,305 INFO L93 Difference]: Finished difference Result 96 states and 194 transitions. [2019-12-07 13:21:24,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-07 13:21:24,305 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2019-12-07 13:21:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:24,306 INFO L225 Difference]: With dead ends: 96 [2019-12-07 13:21:24,306 INFO L226 Difference]: Without dead ends: 87 [2019-12-07 13:21:24,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1048, Invalid=2492, Unknown=0, NotChecked=0, Total=3540 [2019-12-07 13:21:24,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-07 13:21:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 52. [2019-12-07 13:21:24,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 13:21:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-07 13:21:24,309 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 35 [2019-12-07 13:21:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:24,309 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-07 13:21:24,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-07 13:21:24,309 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-07 13:21:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 13:21:24,309 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:24,309 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:24,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:24,510 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2099590699, now seen corresponding path program 28 times [2019-12-07 13:21:24,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:24,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825696018] [2019-12-07 13:21:24,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:24,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825696018] [2019-12-07 13:21:24,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989372332] [2019-12-07 13:21:24,777 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:24,813 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:21:24,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:24,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 13:21:24,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:24,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:24,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-07 13:21:24,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114715937] [2019-12-07 13:21:24,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-07 13:21:24,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-07 13:21:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2019-12-07 13:21:24,839 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 33 states. [2019-12-07 13:21:25,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:25,366 INFO L93 Difference]: Finished difference Result 97 states and 196 transitions. [2019-12-07 13:21:25,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-07 13:21:25,366 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2019-12-07 13:21:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:25,367 INFO L225 Difference]: With dead ends: 97 [2019-12-07 13:21:25,367 INFO L226 Difference]: Without dead ends: 84 [2019-12-07 13:21:25,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1185, Invalid=2475, Unknown=0, NotChecked=0, Total=3660 [2019-12-07 13:21:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-07 13:21:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 49. [2019-12-07 13:21:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-07 13:21:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 100 transitions. [2019-12-07 13:21:25,370 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 100 transitions. Word has length 36 [2019-12-07 13:21:25,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:25,370 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 100 transitions. [2019-12-07 13:21:25,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-07 13:21:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 100 transitions. [2019-12-07 13:21:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 13:21:25,370 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:25,370 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:25,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:25,571 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:25,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:25,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1854355258, now seen corresponding path program 29 times [2019-12-07 13:21:25,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:25,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117602711] [2019-12-07 13:21:25,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:25,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117602711] [2019-12-07 13:21:25,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110473881] [2019-12-07 13:21:25,848 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:25,891 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-12-07 13:21:25,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:25,892 INFO L264 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 13:21:25,893 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:25,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:25,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-07 13:21:25,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632891903] [2019-12-07 13:21:25,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-07 13:21:25,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:25,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-07 13:21:25,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=845, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 13:21:25,914 INFO L87 Difference]: Start difference. First operand 49 states and 100 transitions. Second operand 34 states. [2019-12-07 13:21:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:26,466 INFO L93 Difference]: Finished difference Result 91 states and 184 transitions. [2019-12-07 13:21:26,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-07 13:21:26,467 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2019-12-07 13:21:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:26,467 INFO L225 Difference]: With dead ends: 91 [2019-12-07 13:21:26,467 INFO L226 Difference]: Without dead ends: 85 [2019-12-07 13:21:26,469 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1324, Invalid=2708, Unknown=0, NotChecked=0, Total=4032 [2019-12-07 13:21:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-07 13:21:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2019-12-07 13:21:26,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 13:21:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-07 13:21:26,470 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 37 [2019-12-07 13:21:26,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:26,470 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-07 13:21:26,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-07 13:21:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-07 13:21:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-07 13:21:26,471 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:26,471 INFO L410 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:26,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:26,672 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:26,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:26,672 INFO L82 PathProgramCache]: Analyzing trace with hash -927957869, now seen corresponding path program 30 times [2019-12-07 13:21:26,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:26,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187071445] [2019-12-07 13:21:26,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:26,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187071445] [2019-12-07 13:21:26,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121156825] [2019-12-07 13:21:26,991 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:27,040 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-12-07 13:21:27,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:27,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 13:21:27,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:27,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:27,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-07 13:21:27,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456641493] [2019-12-07 13:21:27,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-07 13:21:27,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:27,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-07 13:21:27,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 13:21:27,064 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 35 states. [2019-12-07 13:21:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:27,615 INFO L93 Difference]: Finished difference Result 93 states and 188 transitions. [2019-12-07 13:21:27,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-07 13:21:27,616 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2019-12-07 13:21:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:27,616 INFO L225 Difference]: With dead ends: 93 [2019-12-07 13:21:27,617 INFO L226 Difference]: Without dead ends: 87 [2019-12-07 13:21:27,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1274, Invalid=3016, Unknown=0, NotChecked=0, Total=4290 [2019-12-07 13:21:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-07 13:21:27,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 51. [2019-12-07 13:21:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-07 13:21:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 104 transitions. [2019-12-07 13:21:27,620 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 104 transitions. Word has length 38 [2019-12-07 13:21:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:27,620 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 104 transitions. [2019-12-07 13:21:27,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-07 13:21:27,621 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 104 transitions. [2019-12-07 13:21:27,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 13:21:27,621 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:27,621 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:27,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:27,822 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:27,823 INFO L82 PathProgramCache]: Analyzing trace with hash -376015390, now seen corresponding path program 31 times [2019-12-07 13:21:27,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:27,823 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416722017] [2019-12-07 13:21:27,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:28,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416722017] [2019-12-07 13:21:28,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387933770] [2019-12-07 13:21:28,146 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:28,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-07 13:21:28,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:28,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:28,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-07 13:21:28,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500508370] [2019-12-07 13:21:28,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-07 13:21:28,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:28,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-07 13:21:28,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 13:21:28,208 INFO L87 Difference]: Start difference. First operand 51 states and 104 transitions. Second operand 36 states. [2019-12-07 13:21:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:28,803 INFO L93 Difference]: Finished difference Result 96 states and 194 transitions. [2019-12-07 13:21:28,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 13:21:28,803 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2019-12-07 13:21:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:28,804 INFO L225 Difference]: With dead ends: 96 [2019-12-07 13:21:28,804 INFO L226 Difference]: Without dead ends: 92 [2019-12-07 13:21:28,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1492, Invalid=3064, Unknown=0, NotChecked=0, Total=4556 [2019-12-07 13:21:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-07 13:21:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2019-12-07 13:21:28,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-07 13:21:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 183 transitions. [2019-12-07 13:21:28,807 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 183 transitions. Word has length 39 [2019-12-07 13:21:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:28,807 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 183 transitions. [2019-12-07 13:21:28,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-07 13:21:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 183 transitions. [2019-12-07 13:21:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-07 13:21:28,807 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:28,807 INFO L410 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:29,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:29,008 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:29,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1585694971, now seen corresponding path program 32 times [2019-12-07 13:21:29,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:29,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704610289] [2019-12-07 13:21:29,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:29,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704610289] [2019-12-07 13:21:29,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812501714] [2019-12-07 13:21:29,348 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:29,387 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:21:29,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:29,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-07 13:21:29,389 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:29,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:29,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-07 13:21:29,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457927811] [2019-12-07 13:21:29,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-07 13:21:29,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:29,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-07 13:21:29,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 13:21:29,412 INFO L87 Difference]: Start difference. First operand 90 states and 183 transitions. Second operand 37 states. [2019-12-07 13:21:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:30,074 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2019-12-07 13:21:30,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 13:21:30,074 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2019-12-07 13:21:30,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:30,075 INFO L225 Difference]: With dead ends: 99 [2019-12-07 13:21:30,075 INFO L226 Difference]: Without dead ends: 91 [2019-12-07 13:21:30,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1513, Invalid=3179, Unknown=0, NotChecked=0, Total=4692 [2019-12-07 13:21:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-07 13:21:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 53. [2019-12-07 13:21:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-07 13:21:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2019-12-07 13:21:30,077 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 40 [2019-12-07 13:21:30,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:30,077 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2019-12-07 13:21:30,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-07 13:21:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2019-12-07 13:21:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-07 13:21:30,077 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:30,078 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:30,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:30,278 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash -573527414, now seen corresponding path program 33 times [2019-12-07 13:21:30,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:30,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740793558] [2019-12-07 13:21:30,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:31,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740793558] [2019-12-07 13:21:31,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471389716] [2019-12-07 13:21:31,474 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:31,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-12-07 13:21:31,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:31,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-07 13:21:31,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:31,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:31,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-07 13:21:31,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770887454] [2019-12-07 13:21:31,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-07 13:21:31,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:31,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-07 13:21:31,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 13:21:31,553 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 38 states. [2019-12-07 13:21:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:32,171 INFO L93 Difference]: Finished difference Result 100 states and 202 transitions. [2019-12-07 13:21:32,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-07 13:21:32,171 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2019-12-07 13:21:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:32,172 INFO L225 Difference]: With dead ends: 100 [2019-12-07 13:21:32,172 INFO L226 Difference]: Without dead ends: 96 [2019-12-07 13:21:32,172 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1501, Invalid=3611, Unknown=0, NotChecked=0, Total=5112 [2019-12-07 13:21:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-07 13:21:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2019-12-07 13:21:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-07 13:21:32,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 191 transitions. [2019-12-07 13:21:32,174 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 191 transitions. Word has length 41 [2019-12-07 13:21:32,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:32,174 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 191 transitions. [2019-12-07 13:21:32,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-07 13:21:32,175 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 191 transitions. [2019-12-07 13:21:32,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-07 13:21:32,175 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:32,175 INFO L410 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:32,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:32,376 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:32,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:32,376 INFO L82 PathProgramCache]: Analyzing trace with hash -860513437, now seen corresponding path program 34 times [2019-12-07 13:21:32,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:32,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489983840] [2019-12-07 13:21:32,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:32,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489983840] [2019-12-07 13:21:32,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982727488] [2019-12-07 13:21:32,774 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:32,825 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:21:32,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:32,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-07 13:21:32,827 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:32,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:32,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-07 13:21:32,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379335345] [2019-12-07 13:21:32,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-07 13:21:32,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-07 13:21:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 13:21:32,853 INFO L87 Difference]: Start difference. First operand 94 states and 191 transitions. Second operand 39 states. [2019-12-07 13:21:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:33,591 INFO L93 Difference]: Finished difference Result 103 states and 208 transitions. [2019-12-07 13:21:33,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-07 13:21:33,591 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2019-12-07 13:21:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:33,592 INFO L225 Difference]: With dead ends: 103 [2019-12-07 13:21:33,592 INFO L226 Difference]: Without dead ends: 99 [2019-12-07 13:21:33,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1692, Invalid=3564, Unknown=0, NotChecked=0, Total=5256 [2019-12-07 13:21:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-12-07 13:21:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 57. [2019-12-07 13:21:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-07 13:21:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 116 transitions. [2019-12-07 13:21:33,594 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 116 transitions. Word has length 42 [2019-12-07 13:21:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:33,594 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 116 transitions. [2019-12-07 13:21:33,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-07 13:21:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 116 transitions. [2019-12-07 13:21:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-07 13:21:33,594 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:33,595 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:33,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:33,795 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1404021454, now seen corresponding path program 35 times [2019-12-07 13:21:33,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:33,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659992337] [2019-12-07 13:21:33,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:34,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659992337] [2019-12-07 13:21:34,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000266770] [2019-12-07 13:21:34,221 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:34,271 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-12-07 13:21:34,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:34,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 13:21:34,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:34,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:34,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-07 13:21:34,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430343840] [2019-12-07 13:21:34,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-07 13:21:34,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:34,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-07 13:21:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 13:21:34,299 INFO L87 Difference]: Start difference. First operand 57 states and 116 transitions. Second operand 40 states. [2019-12-07 13:21:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:35,040 INFO L93 Difference]: Finished difference Result 112 states and 226 transitions. [2019-12-07 13:21:35,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-07 13:21:35,041 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2019-12-07 13:21:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:35,041 INFO L225 Difference]: With dead ends: 112 [2019-12-07 13:21:35,041 INFO L226 Difference]: Without dead ends: 103 [2019-12-07 13:21:35,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1858, Invalid=3842, Unknown=0, NotChecked=0, Total=5700 [2019-12-07 13:21:35,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-07 13:21:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 60. [2019-12-07 13:21:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 13:21:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 122 transitions. [2019-12-07 13:21:35,044 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 122 transitions. Word has length 43 [2019-12-07 13:21:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:35,044 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 122 transitions. [2019-12-07 13:21:35,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-07 13:21:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 122 transitions. [2019-12-07 13:21:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-07 13:21:35,045 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:35,045 INFO L410 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:35,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:35,246 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:35,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1975284683, now seen corresponding path program 36 times [2019-12-07 13:21:35,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:35,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540198644] [2019-12-07 13:21:35,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:35,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540198644] [2019-12-07 13:21:35,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128514593] [2019-12-07 13:21:35,684 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:35,737 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-12-07 13:21:35,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:35,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 13:21:35,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:35,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:35,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-07 13:21:35,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786431297] [2019-12-07 13:21:35,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-07 13:21:35,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:35,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-07 13:21:35,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 13:21:35,763 INFO L87 Difference]: Start difference. First operand 60 states and 122 transitions. Second operand 41 states. [2019-12-07 13:21:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:36,480 INFO L93 Difference]: Finished difference Result 113 states and 228 transitions. [2019-12-07 13:21:36,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-07 13:21:36,480 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2019-12-07 13:21:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:36,481 INFO L225 Difference]: With dead ends: 113 [2019-12-07 13:21:36,481 INFO L226 Difference]: Without dead ends: 100 [2019-12-07 13:21:36,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1769, Invalid=4237, Unknown=0, NotChecked=0, Total=6006 [2019-12-07 13:21:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-07 13:21:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2019-12-07 13:21:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-07 13:21:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 116 transitions. [2019-12-07 13:21:36,483 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 116 transitions. Word has length 44 [2019-12-07 13:21:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:36,483 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 116 transitions. [2019-12-07 13:21:36,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-07 13:21:36,483 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 116 transitions. [2019-12-07 13:21:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-07 13:21:36,484 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:36,484 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:36,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:36,685 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:36,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash -644876838, now seen corresponding path program 37 times [2019-12-07 13:21:36,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:36,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983018383] [2019-12-07 13:21:36,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:37,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983018383] [2019-12-07 13:21:37,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942309520] [2019-12-07 13:21:37,100 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:37,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 13:21:37,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:37,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:37,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-07 13:21:37,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301763043] [2019-12-07 13:21:37,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-07 13:21:37,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:37,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-07 13:21:37,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 13:21:37,168 INFO L87 Difference]: Start difference. First operand 57 states and 116 transitions. Second operand 42 states. [2019-12-07 13:21:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:38,003 INFO L93 Difference]: Finished difference Result 108 states and 218 transitions. [2019-12-07 13:21:38,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-07 13:21:38,003 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2019-12-07 13:21:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:38,004 INFO L225 Difference]: With dead ends: 108 [2019-12-07 13:21:38,004 INFO L226 Difference]: Without dead ends: 104 [2019-12-07 13:21:38,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2056, Invalid=4264, Unknown=0, NotChecked=0, Total=6320 [2019-12-07 13:21:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-07 13:21:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-12-07 13:21:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-07 13:21:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 207 transitions. [2019-12-07 13:21:38,007 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 207 transitions. Word has length 45 [2019-12-07 13:21:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:38,007 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 207 transitions. [2019-12-07 13:21:38,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-07 13:21:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 207 transitions. [2019-12-07 13:21:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-07 13:21:38,007 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:38,007 INFO L410 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:38,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:38,208 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash -126954957, now seen corresponding path program 38 times [2019-12-07 13:21:38,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:38,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661965762] [2019-12-07 13:21:38,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:38,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661965762] [2019-12-07 13:21:38,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313056687] [2019-12-07 13:21:38,671 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:38,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 13:21:38,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:38,715 INFO L264 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-07 13:21:38,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:38,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:38,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-07 13:21:38,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541019771] [2019-12-07 13:21:38,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-07 13:21:38,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:38,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-07 13:21:38,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 13:21:38,741 INFO L87 Difference]: Start difference. First operand 102 states and 207 transitions. Second operand 43 states. [2019-12-07 13:21:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:39,568 INFO L93 Difference]: Finished difference Result 111 states and 224 transitions. [2019-12-07 13:21:39,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-07 13:21:39,569 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2019-12-07 13:21:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:39,569 INFO L225 Difference]: With dead ends: 111 [2019-12-07 13:21:39,569 INFO L226 Difference]: Without dead ends: 107 [2019-12-07 13:21:39,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2080, Invalid=4400, Unknown=0, NotChecked=0, Total=6480 [2019-12-07 13:21:39,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-07 13:21:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 61. [2019-12-07 13:21:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-07 13:21:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2019-12-07 13:21:39,571 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 46 [2019-12-07 13:21:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:39,572 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2019-12-07 13:21:39,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-07 13:21:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2019-12-07 13:21:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-07 13:21:39,572 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:39,572 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:39,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:39,773 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:39,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1251341182, now seen corresponding path program 39 times [2019-12-07 13:21:39,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:39,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582435878] [2019-12-07 13:21:39,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:40,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582435878] [2019-12-07 13:21:40,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983959182] [2019-12-07 13:21:40,275 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:40,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-12-07 13:21:40,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:40,334 INFO L264 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 47 conjunts are in the unsatisfiable core [2019-12-07 13:21:40,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:40,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:21:40,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-07 13:21:40,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077068786] [2019-12-07 13:21:40,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-07 13:21:40,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:40,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-07 13:21:40,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 13:21:40,362 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand 44 states. [2019-12-07 13:21:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:41,168 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2019-12-07 13:21:41,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-07 13:21:41,168 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2019-12-07 13:21:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:41,169 INFO L225 Difference]: With dead ends: 119 [2019-12-07 13:21:41,169 INFO L226 Difference]: Without dead ends: 108 [2019-12-07 13:21:41,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2035, Invalid=4937, Unknown=0, NotChecked=0, Total=6972 [2019-12-07 13:21:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-07 13:21:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2019-12-07 13:21:41,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-07 13:21:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2019-12-07 13:21:41,172 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 47 [2019-12-07 13:21:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:41,172 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2019-12-07 13:21:41,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-07 13:21:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2019-12-07 13:21:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-07 13:21:41,173 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:41,173 INFO L410 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:41,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:41,374 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:41,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:41,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1744619877, now seen corresponding path program 40 times [2019-12-07 13:21:41,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:41,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095676197] [2019-12-07 13:21:41,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:41,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095676197] [2019-12-07 13:21:41,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238981534] [2019-12-07 13:21:41,580 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:41,621 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 13:21:41,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:41,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 13:21:41,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:41,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:21:41,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2019-12-07 13:21:41,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126890414] [2019-12-07 13:21:41,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 13:21:41,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:41,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 13:21:41,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2019-12-07 13:21:41,637 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand 23 states. [2019-12-07 13:21:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:41,664 INFO L93 Difference]: Finished difference Result 923 states and 1761 transitions. [2019-12-07 13:21:41,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 13:21:41,664 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-12-07 13:21:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:41,665 INFO L225 Difference]: With dead ends: 923 [2019-12-07 13:21:41,665 INFO L226 Difference]: Without dead ends: 63 [2019-12-07 13:21:41,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2019-12-07 13:21:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-07 13:21:41,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-12-07 13:21:41,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-07 13:21:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 98 transitions. [2019-12-07 13:21:41,666 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 98 transitions. Word has length 48 [2019-12-07 13:21:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:41,666 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 98 transitions. [2019-12-07 13:21:41,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 13:21:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 98 transitions. [2019-12-07 13:21:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-07 13:21:41,667 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:21:41,667 INFO L410 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:21:41,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:41,867 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:21:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:21:41,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1744619629, now seen corresponding path program 41 times [2019-12-07 13:21:41,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 13:21:41,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881020084] [2019-12-07 13:21:41,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:21:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:21:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:42,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881020084] [2019-12-07 13:21:42,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540408120] [2019-12-07 13:21:42,076 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:42,132 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-12-07 13:21:42,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 13:21:42,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 13:21:42,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:21:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:21:42,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 13:21:42,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2019-12-07 13:21:42,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877378207] [2019-12-07 13:21:42,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 13:21:42,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 13:21:42,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 13:21:42,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2019-12-07 13:21:42,143 INFO L87 Difference]: Start difference. First operand 63 states and 98 transitions. Second operand 23 states. [2019-12-07 13:21:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:21:42,165 INFO L93 Difference]: Finished difference Result 436 states and 613 transitions. [2019-12-07 13:21:42,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-07 13:21:42,165 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-12-07 13:21:42,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:21:42,165 INFO L225 Difference]: With dead ends: 436 [2019-12-07 13:21:42,165 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 13:21:42,166 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2019-12-07 13:21:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 13:21:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 13:21:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 13:21:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 13:21:42,166 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2019-12-07 13:21:42,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:21:42,167 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:21:42,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 13:21:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 13:21:42,167 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 13:21:42,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:21:42,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:21:42 BasicIcfg [2019-12-07 13:21:42,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:21:42,371 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:21:42,371 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:21:42,371 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:21:42,371 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:21:06" (3/4) ... [2019-12-07 13:21:42,374 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 13:21:42,380 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-12-07 13:21:42,380 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-12-07 13:21:42,383 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-12-07 13:21:42,383 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 13:21:42,383 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 13:21:42,410 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_28648d9c-c201-48f1-bd08-db86006edaba/bin/uautomizer/witness.graphml [2019-12-07 13:21:42,411 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:21:42,412 INFO L168 Benchmark]: Toolchain (without parser) took 36986.34 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 499.1 MB). Free memory was 940.7 MB in the beginning and 1.2 GB in the end (delta: -211.8 MB). Peak memory consumption was 287.3 MB. Max. memory is 11.5 GB. [2019-12-07 13:21:42,412 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:21:42,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -153.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. [2019-12-07 13:21:42,413 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. [2019-12-07 13:21:42,413 INFO L168 Benchmark]: Boogie Preprocessor took 20.50 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:21:42,413 INFO L168 Benchmark]: RCFGBuilder took 217.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-12-07 13:21:42,413 INFO L168 Benchmark]: TraceAbstraction took 36324.62 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 373.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -108.2 MB). Peak memory consumption was 265.1 MB. Max. memory is 11.5 GB. [2019-12-07 13:21:42,413 INFO L168 Benchmark]: Witness Printer took 40.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2019-12-07 13:21:42,415 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 349.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -153.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.50 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 217.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 36324.62 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 373.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -108.2 MB). Peak memory consumption was 265.1 MB. Max. memory is 11.5 GB. * Witness Printer took 40.04 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 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: 36.2s, OverallIterations: 43, TraceHistogramMax: 21, AutomataDifference: 14.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 562 SDtfs, 1652 SDslu, 2123 SDs, 0 SdLazy, 3087 SolverSat, 3150 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2854 GetRequests, 1103 SyntacticMatches, 0 SemanticMatches, 1751 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17547 ImplicationChecksByTransitivity, 20.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 43 MinimizatonAttempts, 773 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 2379 NumberOfCodeBlocks, 2379 NumberOfCodeBlocksAsserted, 306 NumberOfCheckSat, 2296 ConstructedInterpolants, 0 QuantifiedInterpolants, 235012 SizeOfPredicates, 779 NumberOfNonLiveVariables, 7215 ConjunctsInSsa, 1101 ConjunctsInUnsatCore, 83 InterpolantComputations, 5 PerfectInterpolantSequences, 1560/11860 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...