./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-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_624f4422-aa14-4506-a2d7-0a49ae2baca7/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 364d2e82c4effeb8ecaceffcae090ef10763971d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 16:27:15,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:27:15,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:27:15,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:27:15,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:27:15,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:27:15,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:27:15,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:27:15,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:27:15,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:27:15,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:27:15,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:27:15,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:27:15,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:27:15,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:27:15,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:27:15,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:27:15,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:27:15,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:27:15,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:27:15,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:27:15,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:27:15,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:27:15,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:27:15,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:27:15,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:27:15,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:27:15,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:27:15,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:27:15,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:27:15,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:27:15,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:27:15,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:27:15,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:27:15,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:27:15,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:27:15,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:27:15,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:27:15,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:27:15,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:27:15,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:27:15,870 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 16:27:15,878 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:27:15,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:27:15,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:27:15,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:27:15,880 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 16:27:15,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:27:15,880 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:27:15,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:27:15,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:27:15,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:27:15,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 16:27:15,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:27:15,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 16:27:15,881 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:27:15,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:27:15,881 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:27:15,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 16:27:15,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:27:15,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 16:27:15,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:27:15,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:27:15,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:27:15,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:27:15,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:27:15,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 16:27:15,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 16:27:15,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:27:15,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 16:27:15,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:27:15,882 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_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 -> 364d2e82c4effeb8ecaceffcae090ef10763971d [2019-12-07 16:27:15,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:27:15,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:27:15,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:27:15,994 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:27:15,994 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:27:15,995 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-1.i [2019-12-07 16:27:16,037 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/bin/uautomizer/data/77859485f/cb44ab2d257446619327bb3ea15bd3f8/FLAGb4004cb67 [2019-12-07 16:27:16,480 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:27:16,481 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/sv-benchmarks/c/pthread/triangular-1.i [2019-12-07 16:27:16,490 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/bin/uautomizer/data/77859485f/cb44ab2d257446619327bb3ea15bd3f8/FLAGb4004cb67 [2019-12-07 16:27:16,498 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/bin/uautomizer/data/77859485f/cb44ab2d257446619327bb3ea15bd3f8 [2019-12-07 16:27:16,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:27:16,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:27:16,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:27:16,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:27:16,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:27:16,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:27:16" (1/1) ... [2019-12-07 16:27:16,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c77c204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16, skipping insertion in model container [2019-12-07 16:27:16,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:27:16" (1/1) ... [2019-12-07 16:27:16,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:27:16,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:27:16,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:27:16,762 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:27:16,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:27:16,832 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:27:16,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16 WrapperNode [2019-12-07 16:27:16,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:27:16,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:27:16,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:27:16,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:27:16,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16" (1/1) ... [2019-12-07 16:27:16,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16" (1/1) ... [2019-12-07 16:27:16,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:27:16,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:27:16,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:27:16,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:27:16,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16" (1/1) ... [2019-12-07 16:27:16,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16" (1/1) ... [2019-12-07 16:27:16,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16" (1/1) ... [2019-12-07 16:27:16,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16" (1/1) ... [2019-12-07 16:27:16,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16" (1/1) ... [2019-12-07 16:27:16,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16" (1/1) ... [2019-12-07 16:27:16,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16" (1/1) ... [2019-12-07 16:27:16,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:27:16,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:27:16,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:27:16,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:27:16,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:16,924 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-07 16:27:16,924 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-07 16:27:16,924 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-07 16:27:16,924 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-07 16:27:16,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 16:27:16,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-07 16:27:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 16:27:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 16:27:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-07 16:27:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:27:16,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:27:16,926 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 16:27:17,096 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:27:17,096 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 16:27:17,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:27:17 BoogieIcfgContainer [2019-12-07 16:27:17,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:27:17,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:27:17,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:27:17,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:27:17,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:27:16" (1/3) ... [2019-12-07 16:27:17,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3969aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:27:17, skipping insertion in model container [2019-12-07 16:27:17,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:27:16" (2/3) ... [2019-12-07 16:27:17,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3969aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:27:17, skipping insertion in model container [2019-12-07 16:27:17,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:27:17" (3/3) ... [2019-12-07 16:27:17,102 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2019-12-07 16:27:17,108 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-07 16:27:17,108 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:27:17,112 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 16:27:17,112 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-07 16:27:17,129 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,129 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,129 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,129 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,130 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,130 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,130 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,130 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,130 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,130 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,130 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,130 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,131 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,131 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,131 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,131 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,131 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,131 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,131 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,131 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,132 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,132 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,132 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,132 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,132 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,132 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,132 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,132 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-07 16:27:17,144 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-07 16:27:17,156 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:27:17,156 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 16:27:17,156 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:27:17,157 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:27:17,157 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:27:17,157 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:27:17,157 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:27:17,157 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:27:17,165 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-07 16:27:17,166 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-07 16:27:17,189 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-07 16:27:17,190 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 16:27:17,195 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 16:27:17,197 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-07 16:27:17,206 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-07 16:27:17,206 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-07 16:27:17,207 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 16:27:17,208 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-07 16:27:17,209 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-07 16:27:17,850 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-07 16:27:17,850 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-07 16:27:17,853 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-07 16:27:17,859 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-07 16:27:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-07 16:27:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 16:27:17,864 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:17,865 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 16:27:17,865 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:17,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:17,869 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-07 16:27:17,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:17,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189907276] [2019-12-07 16:27:17,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:18,024 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 16:27:18,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189907276] [2019-12-07 16:27:18,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:27:18,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 16:27:18,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385346368] [2019-12-07 16:27:18,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 16:27:18,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:18,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 16:27:18,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:27:18,040 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-07 16:27:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:18,062 INFO L93 Difference]: Finished difference Result 44 states and 107 transitions. [2019-12-07 16:27:18,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 16:27:18,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-07 16:27:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:18,070 INFO L225 Difference]: With dead ends: 44 [2019-12-07 16:27:18,071 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 16:27:18,071 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 16:27:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 16:27:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 16:27:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 16:27:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 56 transitions. [2019-12-07 16:27:18,095 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 56 transitions. Word has length 5 [2019-12-07 16:27:18,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:18,096 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 56 transitions. [2019-12-07 16:27:18,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 16:27:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 56 transitions. [2019-12-07 16:27:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 16:27:18,096 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:18,096 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:18,096 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:18,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:18,097 INFO L82 PathProgramCache]: Analyzing trace with hash 232910220, now seen corresponding path program 1 times [2019-12-07 16:27:18,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:18,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706897572] [2019-12-07 16:27:18,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:18,154 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 16:27:18,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706897572] [2019-12-07 16:27:18,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:27:18,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 16:27:18,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059201512] [2019-12-07 16:27:18,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 16:27:18,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 16:27:18,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 16:27:18,157 INFO L87 Difference]: Start difference. First operand 26 states and 56 transitions. Second operand 4 states. [2019-12-07 16:27:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:18,183 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-07 16:27:18,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:27:18,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 16:27:18,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:18,184 INFO L225 Difference]: With dead ends: 40 [2019-12-07 16:27:18,184 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 16:27:18,185 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 16:27:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 16:27:18,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-12-07 16:27:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 16:27:18,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-07 16:27:18,188 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 7 [2019-12-07 16:27:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:18,189 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-07 16:27:18,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 16:27:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-07 16:27:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 16:27:18,189 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:18,189 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:18,190 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:18,190 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-07 16:27:18,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:18,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405158101] [2019-12-07 16:27:18,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:18,244 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 16:27:18,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405158101] [2019-12-07 16:27:18,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:27:18,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 16:27:18,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810215692] [2019-12-07 16:27:18,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 16:27:18,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:18,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 16:27:18,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 16:27:18,246 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 5 states. [2019-12-07 16:27:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:18,277 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-07 16:27:18,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 16:27:18,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 16:27:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:18,279 INFO L225 Difference]: With dead ends: 38 [2019-12-07 16:27:18,279 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 16:27:18,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:27:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 16:27:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-07 16:27:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 16:27:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-07 16:27:18,283 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-07 16:27:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:18,284 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-07 16:27:18,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 16:27:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-07 16:27:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 16:27:18,285 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:18,285 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:18,285 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 2 times [2019-12-07 16:27:18,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:18,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779747115] [2019-12-07 16:27:18,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:18,351 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 16:27:18,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779747115] [2019-12-07 16:27:18,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176145288] [2019-12-07 16:27:18,351 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:18,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:27:18,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:27:18,401 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 16:27:18,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:18,423 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 16:27:18,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:27:18,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-07 16:27:18,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113003782] [2019-12-07 16:27:18,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 16:27:18,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:18,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 16:27:18,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-12-07 16:27:18,424 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 7 states. [2019-12-07 16:27:18,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:18,472 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-07 16:27:18,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 16:27:18,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-07 16:27:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:18,473 INFO L225 Difference]: With dead ends: 37 [2019-12-07 16:27:18,473 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 16:27:18,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:27:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 16:27:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-12-07 16:27:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 16:27:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-07 16:27:18,476 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 10 [2019-12-07 16:27:18,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:18,476 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-07 16:27:18,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 16:27:18,476 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-07 16:27:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 16:27:18,477 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:18,477 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:18,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:18,678 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:18,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:18,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 3 times [2019-12-07 16:27:18,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:18,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592285788] [2019-12-07 16:27:18,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:18,799 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 16:27:18,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592285788] [2019-12-07 16:27:18,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334626383] [2019-12-07 16:27:18,800 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:18,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 16:27:18,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:27:18,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 16:27:18,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:18,880 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 16:27:18,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:27:18,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-07 16:27:18,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207821333] [2019-12-07 16:27:18,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 16:27:18,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:18,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 16:27:18,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 16:27:18,882 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 8 states. [2019-12-07 16:27:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:18,954 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-07 16:27:18,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 16:27:18,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-07 16:27:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:18,955 INFO L225 Difference]: With dead ends: 41 [2019-12-07 16:27:18,955 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 16:27:18,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-12-07 16:27:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 16:27:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-12-07 16:27:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 16:27:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 71 transitions. [2019-12-07 16:27:18,959 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 71 transitions. Word has length 11 [2019-12-07 16:27:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:18,959 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 71 transitions. [2019-12-07 16:27:18,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 16:27:18,959 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 71 transitions. [2019-12-07 16:27:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 16:27:18,959 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:18,959 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:19,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:19,160 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:19,161 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 4 times [2019-12-07 16:27:19,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:19,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002719558] [2019-12-07 16:27:19,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:19,249 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 16:27:19,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002719558] [2019-12-07 16:27:19,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597805842] [2019-12-07 16:27:19,249 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:19,283 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:27:19,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:27:19,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 16:27:19,284 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:19,294 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 16:27:19,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:27:19,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 16:27:19,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776342291] [2019-12-07 16:27:19,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 16:27:19,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:19,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 16:27:19,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:27:19,295 INFO L87 Difference]: Start difference. First operand 34 states and 71 transitions. Second operand 9 states. [2019-12-07 16:27:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:19,364 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-07 16:27:19,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 16:27:19,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-07 16:27:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:19,365 INFO L225 Difference]: With dead ends: 43 [2019-12-07 16:27:19,365 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 16:27:19,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-12-07 16:27:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 16:27:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-12-07 16:27:19,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 16:27:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 75 transitions. [2019-12-07 16:27:19,369 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 75 transitions. Word has length 12 [2019-12-07 16:27:19,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:19,369 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 75 transitions. [2019-12-07 16:27:19,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 16:27:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 75 transitions. [2019-12-07 16:27:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 16:27:19,369 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:19,370 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:19,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:19,570 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:19,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973298, now seen corresponding path program 5 times [2019-12-07 16:27:19,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:19,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415370386] [2019-12-07 16:27:19,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:27:19,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415370386] [2019-12-07 16:27:19,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405728774] [2019-12-07 16:27:19,655 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:19,692 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-07 16:27:19,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:27:19,693 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 16:27:19,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:27:19,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:27:19,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 16:27:19,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329909470] [2019-12-07 16:27:19,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 16:27:19,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:19,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 16:27:19,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:27:19,710 INFO L87 Difference]: Start difference. First operand 36 states and 75 transitions. Second operand 9 states. [2019-12-07 16:27:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:19,767 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-07 16:27:19,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 16:27:19,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-07 16:27:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:19,768 INFO L225 Difference]: With dead ends: 41 [2019-12-07 16:27:19,768 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 16:27:19,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:27:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 16:27:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2019-12-07 16:27:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 16:27:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-07 16:27:19,771 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 13 [2019-12-07 16:27:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:19,771 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-07 16:27:19,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 16:27:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-07 16:27:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 16:27:19,771 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:19,771 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:19,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:19,972 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 6 times [2019-12-07 16:27:19,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:19,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977331436] [2019-12-07 16:27:19,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:20,026 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 16:27:20,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977331436] [2019-12-07 16:27:20,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252052628] [2019-12-07 16:27:20,027 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:20,062 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-07 16:27:20,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:27:20,063 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 16:27:20,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:20,073 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 16:27:20,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:27:20,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-07 16:27:20,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476574871] [2019-12-07 16:27:20,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 16:27:20,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:20,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 16:27:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:27:20,075 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 10 states. [2019-12-07 16:27:20,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:20,148 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-07 16:27:20,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 16:27:20,148 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-07 16:27:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:20,148 INFO L225 Difference]: With dead ends: 45 [2019-12-07 16:27:20,148 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 16:27:20,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-07 16:27:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 16:27:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-12-07 16:27:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 16:27:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2019-12-07 16:27:20,151 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2019-12-07 16:27:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:20,152 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2019-12-07 16:27:20,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 16:27:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2019-12-07 16:27:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 16:27:20,152 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:20,152 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:20,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:20,353 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:20,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:20,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 7 times [2019-12-07 16:27:20,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:20,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456872413] [2019-12-07 16:27:20,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:20,438 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 16:27:20,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456872413] [2019-12-07 16:27:20,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031769291] [2019-12-07 16:27:20,438 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:20,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 16:27:20,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:20,485 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 16:27:20,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:27:20,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-07 16:27:20,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385378769] [2019-12-07 16:27:20,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 16:27:20,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:20,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 16:27:20,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-12-07 16:27:20,486 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand 11 states. [2019-12-07 16:27:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:20,574 INFO L93 Difference]: Finished difference Result 48 states and 98 transitions. [2019-12-07 16:27:20,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 16:27:20,574 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-07 16:27:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:20,575 INFO L225 Difference]: With dead ends: 48 [2019-12-07 16:27:20,575 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 16:27:20,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2019-12-07 16:27:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 16:27:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-12-07 16:27:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 16:27:20,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-12-07 16:27:20,578 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 14 [2019-12-07 16:27:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:20,578 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-12-07 16:27:20,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 16:27:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-12-07 16:27:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 16:27:20,578 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:20,579 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:20,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:20,779 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:20,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1140832998, now seen corresponding path program 8 times [2019-12-07 16:27:20,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:20,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539713173] [2019-12-07 16:27:20,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:27:20,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539713173] [2019-12-07 16:27:20,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214523045] [2019-12-07 16:27:20,901 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:20,934 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 16:27:20,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:27:20,935 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 16:27:20,936 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 16:27:20,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:27:20,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-07 16:27:20,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152373257] [2019-12-07 16:27:20,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 16:27:20,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 16:27:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-12-07 16:27:20,947 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 11 states. [2019-12-07 16:27:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:21,031 INFO L93 Difference]: Finished difference Result 53 states and 108 transitions. [2019-12-07 16:27:21,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 16:27:21,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-12-07 16:27:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:21,032 INFO L225 Difference]: With dead ends: 53 [2019-12-07 16:27:21,032 INFO L226 Difference]: Without dead ends: 48 [2019-12-07 16:27:21,032 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-07 16:27:21,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-07 16:27:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2019-12-07 16:27:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 16:27:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 84 transitions. [2019-12-07 16:27:21,035 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 84 transitions. Word has length 15 [2019-12-07 16:27:21,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:21,035 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 84 transitions. [2019-12-07 16:27:21,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 16:27:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 84 transitions. [2019-12-07 16:27:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 16:27:21,036 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:21,036 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:21,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:21,237 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:21,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 9 times [2019-12-07 16:27:21,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:21,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471953244] [2019-12-07 16:27:21,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:21,345 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 16:27:21,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471953244] [2019-12-07 16:27:21,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066860124] [2019-12-07 16:27:21,346 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:21,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 16:27:21,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:27:21,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 16:27:21,381 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:21,394 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 16:27:21,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:27:21,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-07 16:27:21,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316584541] [2019-12-07 16:27:21,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 16:27:21,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:21,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 16:27:21,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:27:21,395 INFO L87 Difference]: Start difference. First operand 41 states and 84 transitions. Second operand 13 states. [2019-12-07 16:27:21,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:21,514 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2019-12-07 16:27:21,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 16:27:21,515 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-07 16:27:21,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:21,515 INFO L225 Difference]: With dead ends: 52 [2019-12-07 16:27:21,515 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 16:27:21,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-12-07 16:27:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 16:27:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2019-12-07 16:27:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 16:27:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-07 16:27:21,518 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-07 16:27:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:21,518 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-07 16:27:21,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 16:27:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-07 16:27:21,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 16:27:21,519 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:21,519 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:21,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:21,720 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:21,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 10 times [2019-12-07 16:27:21,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:21,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056715028] [2019-12-07 16:27:21,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:21,810 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 16:27:21,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056715028] [2019-12-07 16:27:21,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215345850] [2019-12-07 16:27:21,810 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:21,840 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 16:27:21,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:27:21,841 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 16:27:21,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:21,852 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 16:27:21,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:27:21,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-07 16:27:21,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525368190] [2019-12-07 16:27:21,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 16:27:21,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:21,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 16:27:21,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-12-07 16:27:21,854 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 13 states. [2019-12-07 16:27:21,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:21,972 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-12-07 16:27:21,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 16:27:21,972 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-07 16:27:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:21,973 INFO L225 Difference]: With dead ends: 49 [2019-12-07 16:27:21,973 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 16:27:21,973 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2019-12-07 16:27:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 16:27:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2019-12-07 16:27:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 16:27:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-12-07 16:27:21,975 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 16 [2019-12-07 16:27:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:21,976 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-12-07 16:27:21,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 16:27:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-12-07 16:27:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 16:27:21,976 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:21,976 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:22,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:22,177 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:22,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 11 times [2019-12-07 16:27:22,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:22,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66050962] [2019-12-07 16:27:22,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:22,274 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 16:27:22,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66050962] [2019-12-07 16:27:22,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106851308] [2019-12-07 16:27:22,274 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:22,316 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-07 16:27:22,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:27:22,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 16:27:22,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:22,332 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 16:27:22,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 16:27:22,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-07 16:27:22,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925884860] [2019-12-07 16:27:22,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 16:27:22,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:22,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 16:27:22,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-07 16:27:22,334 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 14 states. [2019-12-07 16:27:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:22,484 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-07 16:27:22,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 16:27:22,484 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-07 16:27:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:22,484 INFO L225 Difference]: With dead ends: 47 [2019-12-07 16:27:22,484 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 16:27:22,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2019-12-07 16:27:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 16:27:22,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-07 16:27:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 16:27:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-07 16:27:22,487 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-07 16:27:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:22,487 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-07 16:27:22,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 16:27:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-07 16:27:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 16:27:22,488 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:22,488 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:22,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:22,689 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 12 times [2019-12-07 16:27:22,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:22,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650773236] [2019-12-07 16:27:22,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:27:22,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650773236] [2019-12-07 16:27:22,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974044872] [2019-12-07 16:27:22,726 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:22,762 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-07 16:27:22,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:27:22,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 16:27:22,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:27:22,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 16:27:22,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2019-12-07 16:27:22,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102307614] [2019-12-07 16:27:22,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 16:27:22,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:22,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 16:27:22,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:27:22,771 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 8 states. [2019-12-07 16:27:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:22,779 INFO L93 Difference]: Finished difference Result 96 states and 167 transitions. [2019-12-07 16:27:22,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 16:27:22,780 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-07 16:27:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:22,780 INFO L225 Difference]: With dead ends: 96 [2019-12-07 16:27:22,780 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 16:27:22,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:27:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 16:27:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-07 16:27:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 16:27:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2019-12-07 16:27:22,782 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 18 [2019-12-07 16:27:22,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:22,783 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2019-12-07 16:27:22,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 16:27:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2019-12-07 16:27:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 16:27:22,783 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:27:22,783 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:27:22,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:22,984 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 16:27:22,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:27:22,985 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 13 times [2019-12-07 16:27:22,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:27:22,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456001593] [2019-12-07 16:27:22,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:27:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:27:23,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456001593] [2019-12-07 16:27:23,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324347255] [2019-12-07 16:27:23,025 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/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 16:27:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:27:23,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 16:27:23,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:27:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:27:23,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 16:27:23,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2019-12-07 16:27:23,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961210762] [2019-12-07 16:27:23,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 16:27:23,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 16:27:23,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 16:27:23,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:27:23,066 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 8 states. [2019-12-07 16:27:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:27:23,073 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2019-12-07 16:27:23,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 16:27:23,073 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-07 16:27:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:27:23,073 INFO L225 Difference]: With dead ends: 46 [2019-12-07 16:27:23,073 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 16:27:23,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-07 16:27:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 16:27:23,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 16:27:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 16:27:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 16:27:23,074 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-12-07 16:27:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:27:23,074 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:27:23,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 16:27:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 16:27:23,074 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 16:27:23,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:27:23,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:27:23 BasicIcfg [2019-12-07 16:27:23,277 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:27:23,277 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:27:23,277 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:27:23,277 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:27:23,278 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:27:17" (3/4) ... [2019-12-07 16:27:23,280 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 16:27:23,284 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-12-07 16:27:23,285 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-12-07 16:27:23,287 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-12-07 16:27:23,287 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 16:27:23,287 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 16:27:23,317 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_624f4422-aa14-4506-a2d7-0a49ae2baca7/bin/uautomizer/witness.graphml [2019-12-07 16:27:23,317 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:27:23,318 INFO L168 Benchmark]: Toolchain (without parser) took 6816.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -188.6 MB). Peak memory consumption was 261.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:27:23,318 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:27:23,319 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 78.1 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -111.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-12-07 16:27:23,319 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.46 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:27:23,319 INFO L168 Benchmark]: Boogie Preprocessor took 18.31 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:27:23,319 INFO L168 Benchmark]: RCFGBuilder took 214.92 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-12-07 16:27:23,320 INFO L168 Benchmark]: TraceAbstraction took 6179.15 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 50.9 MB). Free memory was 1.0 GB in the beginning and 807.4 MB in the end (delta: 215.5 MB). Peak memory consumption was 266.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:27:23,320 INFO L168 Benchmark]: Witness Printer took 39.54 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 4.7 MB). Free memory was 807.4 MB in the beginning and 1.1 GB in the end (delta: -321.0 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. [2019-12-07 16:27:23,322 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 330.74 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 78.1 MB). Free memory was 939.8 MB in the beginning and 1.1 GB in the end (delta: -111.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.46 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.31 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 214.92 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6179.15 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 50.9 MB). Free memory was 1.0 GB in the beginning and 807.4 MB in the end (delta: 215.5 MB). Peak memory consumption was 266.4 MB. Max. memory is 11.5 GB. * Witness Printer took 39.54 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 4.7 MB). Free memory was 807.4 MB in the beginning and 1.1 GB in the end (delta: -321.0 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.6s, 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: 6.1s, OverallIterations: 15, TraceHistogramMax: 6, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 392 SDslu, 385 SDs, 0 SdLazy, 394 SolverSat, 244 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 325 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 80 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 367 NumberOfCodeBlocks, 367 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 340 ConstructedInterpolants, 0 QuantifiedInterpolants, 14424 SizeOfPredicates, 55 NumberOfNonLiveVariables, 1261 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 27 InterpolantComputations, 5 PerfectInterpolantSequences, 94/288 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...